#help-27

1 messages · Page 312 of 1

past moat
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ah ok great

restive river
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and i just figured out this discord server

past moat
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look at the bracket

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it has hard powers in it

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so lets simplify

restive river
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ok wait

past moat
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do u=3x^5
is that part clear?

restive river
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ye ig

past moat
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u can set u to whatever u want

restive river
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like..

past moat
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so here we set it to that

restive river
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so the same thing

past moat
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then for the y^3

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do p = y^3

restive river
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whats p??

past moat
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basically its

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any number i want it to be

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its a variable

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and i want p to be y^3

restive river
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ahh

past moat
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same goes for u

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i want u to be 3x^5

restive river
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alr

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i wrote it

past moat
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is it like this?

restive river
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why is it not loading for me

past moat
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click the image to load it faster

restive river
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opk nvm,

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ok

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nvm

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yes

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it looks like that]

past moat
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great

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you know what u can do now?

restive river
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no

past moat
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u can put them in the brackets

restive river
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ohh

past moat
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instead of 3x^5 you have a beautiful u

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looks alot nicer doesnt it?

restive river
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can you write it like how it should be

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cz idk how to put it in brackets

past moat
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just replace

restive river
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oh

past moat
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what did u set u equal to?

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what did u set p = to?

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since there equal u can replace them

restive river
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3x to the power of 5

past moat
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exactly

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so like this

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u see how much nicer it looks

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now u can expand it easily right?

restive river
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what abt the y to the power of 3

past moat
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we did p = y^3

restive river
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oh

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right

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ok i wrote it down

past moat
restive river
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erm

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uhh

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wait

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would it be u to the power of 2 and p to the power of 2 or??

past moat
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close

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also a question

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did you sneak into this class or sum? 😭

restive river
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wdym

past moat
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u should not be struggling this much 😭

restive river
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bro

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idk

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im stupid

past moat
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nah its fine

restive river
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and this work is so dumb

past moat
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u just didnt practice enough

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frfr

restive river
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yea the teacher said

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ig i just didnt listen to her

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as im suppose to

past moat
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its fine u now know U NEED TO STUDY

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anyways

restive river
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ye

past moat
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its u^2 -2 x u x p + p^2

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is that fine?

restive river
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lemme see

past moat
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how are ur friends doing are they also struggling w this?

restive river
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i dont have friends

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lol

past moat
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just talk to them ull make friends easily trust

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anyways

restive river
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i guess its fine

restive river
past moat
past moat
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now

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next step

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the hardest step

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😮‍💨

restive river
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bruh

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pl

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ok

past moat
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just to make sure

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it should look like this

restive river
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hmm

past moat
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right?

restive river
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wait

past moat
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the dot between u and p is a times

restive river
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oh

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ok

past moat
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its 2 times u timesp

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okay now

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what did we set u as?

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bro dead

restive river
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3x to the power of 2

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right

past moat
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5

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power of 5

restive river
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oh

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right

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😭

past moat
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on ur paper

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send me a photo of how it looks like

restive river
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alr

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the first u has a power of 2 on top

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what would i do

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@past moat

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and how would i do that

past moat
restive river
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oh

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ok

past moat
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(3x^5)^2

restive river
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ok

past moat
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@junior flax can you take over i need to need to sleep fr

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its 3 am for me'

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😭

restive river
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BRUHHH

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noooo

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last one then ill come tommorow

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please

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dont sleep

past moat
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if greater can help u its fine

restive river
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nooooo

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please

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dont sleep

past moat
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go on

restive river
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(3x^5)^2 - 2 (3x^5)(p)+p^2 @past moat

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is ts fine

past moat
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YESSS

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now

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u remember what e set p as?

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we*

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its y^3

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just replace p with y^3

restive river
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ok

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wait

past moat
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okay

restive river
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(3x^5)^2 - 2(3x^5)(y^3)+(y^3)^2 @past moat

past moat
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Yessssss

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Okay

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Now

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I want you to know something

restive river
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okay

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what is it

past moat
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(x²)² = x power 2 times 2

restive river
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okay

past moat
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And x² times x² = x power 2 + 2

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Okay?

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These are power rules

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Lemme send them rq

restive river
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oh ok

past moat
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These are power rules

restive river
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ill save this

past moat
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Deal

restive river
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wdym

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deal?

past moat
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Deal means okay

restive river
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oh ok

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now did i finish this question?

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or is there more

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@past moat

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uhh

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@past moat ?

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.

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.

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.

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.

past moat
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Sorry back

past moat
restive river
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its ok

past moat
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Now

#

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Is how much?

restive river
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9

past moat
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(X⁵)²

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How much?

restive river
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25

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x^25

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or is it not

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@past moat

past moat
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What does the rule say

restive river
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uhmm

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oh

past moat
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Its x¹⁰ since u multiply

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So its 9x¹⁰

restive river
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oh ok

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uh

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now what

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uh

restive river
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i did

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ohh

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u mean solve it

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so is it y^9? @past moat

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or not

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probably wrong

past moat
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Y⁶

restive river
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6

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oh ok

past moat
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So whats the full equation now

restive river
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lemme write it

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wait

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3x^5)^2 - 2(3x^5)(y^3)+(y^6) @past moat

past moat
restive river
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uh

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is it?

restive river
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wdym

past moat
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First one

restive river
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oh

past moat
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We already did it

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Up

restive river
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can you write it?

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i dont understand

past moat
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9x¹⁰- 2(3x⁵)(y³) + y⁶

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Good?

restive river
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yes

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ok now what

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i wrote it down

past moat
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Great

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Thats the final answe

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Answer

restive river
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oh really?

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thank you

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thank you

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very much

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can i friend you on discord @past moat

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or do you not allow it

past moat
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For sure

restive river
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thanks

past moat
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Np

restive river
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wait

past moat
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Is there mor

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More?

restive river
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what are ur like help hours

restive river
past moat
restive river
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ill re open tmrw if i need help

past moat
restive river
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i will

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thanks thats all i had

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@past moat

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do i close this

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or will you?

past moat
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YOOOO NICE

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Its fine

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.close

restive river
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thanks

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bye

past moat
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Np

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👋

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.close

restive river
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.close

devout snowBOT
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Channel closed

Closed by @dim sapphire

Use .reopen if this was a mistake.

past moat
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Idk how to close it lol

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Ah

restive river
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there

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okk byeee

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see you tmrw

devout snowBOT
#
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stark shuttle
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Hello

devout snowBOT
stark shuttle
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I'm confused on why it is drawn like this

valid vector
woven radishBOT
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mathisfun

stark shuttle
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And also I thought √(1-x^2) was a semi circle

valid vector
stark shuttle
valid vector
valid vector
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Look, $y=\pm\sqrt{1-x^2}\implies x^2+y^2=1$.

woven radishBOT
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mathisfun

valid vector
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Obviously, this is a unit circle.

stark shuttle
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I get that

valid vector
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We have the bounds $0\le x\le 1$, so...?

woven radishBOT
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mathisfun

stark shuttle
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Then why is the left half of the circle missing?

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Oh

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OH

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I realized we haven't converted into polar yet lol

valid vector
stark shuttle
#

.close

devout snowBOT
#
Channel closed

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devout snowBOT
#
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Show your work, and if possible, explain where you are stuck.
After 15 minutes, feel free to ping <@&286206848099549185>.
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vocal wren
#

soccer she won 1/3 out of 3, could have won: 3 won: 1
basketball she won 1/2 out of 2, could have won: 2 won: 1

in total she could have won: 5

vocal wren
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other options should be fine too, but is 5 a valid answer also ?

valid vector
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What is 5/3?

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And 5/2?

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The point is, it is 1/3 of her total trophies

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and 1/2 of her total trophies

vocal wren
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I dont think thats what the text says

vocal wren
valid vector
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How can she win a half of a trophy??

vocal wren
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oh

valid vector
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"She won half of her trophies for soccer"
She physically cannot win half of her trophies.

vocal wren
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not that half of her trophies are from basketball

valid vector
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Like I said, physically impossible.

vocal wren
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then yeah its not correct

valid vector
#

This is a very badly worded question.

vocal wren
#

would this be true ?

soccer she won 1/3 out of 3, could have won: 3 won: 1
basketball she won 1/2 out of 2, could have won: 2 won: 1

in total she could have won: 5

valid vector
vocal wren
#

got it, thanks for the help

sonic parrot
potent tusk
sonic parrot
vocal wren
vocal wren
#

.close

devout snowBOT
#
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devout snowBOT
#
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mortal aspen
#

uhmm how to find the minimum points to this type of graph?

mortal aspen
#

this si the full question if needed

devout snowBOT
#

@mortal aspen Has your question been resolved?

supple trench
# mortal aspen this si the full question if needed

you can apply the fundamental theorem of linear programming
https://en.wikipedia.org/wiki/Fundamental_theorem_of_linear_programming

In mathematical optimization, the fundamental theorem of linear programming states, in a weak formulation, that the maxima and minima of a linear function over a convex polygonal region occur at the region's corners. Further, if an extreme value occurs at two corners, then it must also occur everywhere on the line segment between them.

mortal aspen
#

thnkk u

#

.close

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#
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queen ravine
#

why im i not getting zero

devout snowBOT
queen ravine
faint zinc
#

Because of floating point error

queen ravine
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what is that?

faint zinc
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Computers store real numbers in an approximate form

young spade
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numbers in computers arent the actual number but just a really close aproximations

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sooo, instead of 0, you get like: 0.0000000000000008

faint zinc
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For instance, a computer cannot actually calculate 0.1 + 0.2 and arrive at 0.3

queen ravine
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what do they arrive at

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oh

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is it impossible for computers to store real numbers?

faint zinc
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Yes, a general real number takes an infinite amount of data to specify

queen ravine
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oh wow

young spade
faint zinc
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A computer can exactly store some real numbers, everything else gets rounded to one of them

queen ravine
young spade
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desmos has the bad tendency of not doing the rounding on these kind of problem for some reason

queen ravine
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aight thank you so much guys

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.close

devout snowBOT
#
Channel closed

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marsh bane
#

.reopen

faint zinc
#

Why?

marsh bane
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Cause I need help

faint zinc
marsh bane
#

I alr did

faint zinc
#

Then wait there please

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#
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restive river
#

I need help at Calculate limit limes,

devout snowBOT
restive river
#

<@&286206848099549185>

young spade
#

!status

devout snowBOT
#
What step are you on?
1. I don't know where to begin.
2. I have begun but got stuck midway.
3. I got an answer but I was told that it's wrong.
4. I got an answer and would like my work checked.
5. I have a question about someone else's work/solution.
6. I have completed the problem and don't need help anymore. Thank you.
7. None of the above
restive river
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2

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How do I get the dominant if there are brackets

young spade
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ill guess those symbols mean taking the limit from x to +infinty and x to -infinity

restive river
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Yes

young spade
woven radishBOT
#

zzz0nnn

restive river
#

If u want I can send you the original paper

young spade
restive river
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The 1b

young spade
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still, try to do the full multiplication of terms

restive river
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Mhhh

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I get it, im confused bcs look at 1a the dominant is x^4

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And at 1b I just read it like the first one or must I add the one x3 with the other x so I get x4

young spade
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you could also evaluate by solving both

i guess you already figured that for +infinity its just +infinity

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-infinity . -infinity would also lead you to the same answer anyways

restive river
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Well I guess I just try it

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But thx do

young spade
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you could also follow this route

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since x and x^3 have odd exponent, you retain the negative sign

restive river
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Ah I might have the solution

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Hear me out

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Look at first bracket the highest exponent it’s x^1 why 1 bcs if there is a variable with no exponent it’s 1, so and now look a the second bracket the highest exponent is x^3 so if you multiply them with 5 u get 5x^4.
Why 5 bcs with the five u can decide wether + infinity ♾️ or - infinity ♾️

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I think so it’s right

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Lemme ask gpt

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Now I get it Bro thx for your help
@young spade

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If I got another problem I let u know

devout snowBOT
#

@restive river Has your question been resolved?

#
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#
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regal berry
#

$1,(4)\sqrt{75} * (-2,4\sqrt{50}) * (-1/{26} \sqrt{18})$

woven radishBOT
regal berry
#

i kept trying this problem and i keep getting it wrong for some reason

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$\frac{4}{9} * 5\sqrt{3} * (\frac{24}{10}* 5\sqrt{2}) * (1/26 *3\sqrt{2})$

woven radishBOT
regal berry
#

is this right? or not

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also 1,(4) above here means 1.44444..

winter patrol
#

4/9 would be 0.4444...
not 1.444....

devout snowBOT
#

@regal berry Has your question been resolved?

valid vector
#

@regal berry I am confused, what are you trying to do?

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#
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broken pivot
#

yeah, im a little stuck on this, tried making the equations for x1 x2 x3 and x4 but it just confused me, as x3 has an x2 value in its equation

broken pivot
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oh wait im stupid

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i thought the 2 was x2

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wait holdon i think i got this

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-+

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#

@broken pivot Has your question been resolved?

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dusk pilot
#

Minor question. could someone explain this to me, I'm not sure exactly whats being asked of me. I dont "remember" cryinggif

jagged harbor
#

if this is instructor feedback on your submitted work, I think they're just saying to put the "for all (...)" junk before the rest of the statement

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although, by the comment, it almost sounds like the instructor didn't see that you did include the quantifiers, just after the statement

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because like, you did repeat the quantifiers

dusk pilot
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i thought so, I just wanted to make sure to avoid doing something wrong again

jagged harbor
#

maybe they mean to repeat the quantifiers exactly? idk

dusk pilot
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i think what you said first is correct (hopefully)

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thank you

jagged harbor
#

in practice, you don't need to explicitly state the contrapositive in a proof, but it certainly helps for legibility

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e.g. "Let a,b,c be integers. It suffices to demonstrate the contrapositive, i.e. that if a | b or a | c, then a | bc" and then proceed

dusk pilot
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my prof is really hard about this stuff for a discrete 1 class CRY

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appreciate your help tho, u can close it if you'd like

jagged harbor
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you know, after seeing the wacky things students do with proofs, I get it

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you do have to genuinely know how to identify what's logically correct before allowing yourself to bend the rules to help the writing style

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otherwise you tend to sound like a loon lol

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"too handwavy" etc

dusk pilot
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i get ya

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sucks for me tho cryinggif

jagged harbor
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it'll pass

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after your first proofs class, the instructors assume you can write a proof

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and the content will shift away from the proofwriting itself, although it's still definitely important

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it's like knowing how to cite your sources before taking a literature class I guess?

dusk pilot
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i transferred credits from a uni a few years ago and they somehow gave me discrete 2 credits and not discrete 1 credits. I've never taken a discrete 2 class in my life

jagged harbor
#

there's a chance your equivalent counted for both

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someone in my "discrete math" class transferred into a uni that splits the two in their CS program, and he got credits for both

dusk pilot
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I checked with my advisor and it didnt, thats why i gotta take this class after forgetting everything already

jagged harbor
#

oh word

dusk pilot
#

should've waited for an online summer course and speedran PensiveBread

jagged harbor
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eh it's whatever

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the hard stuff is good for you

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plus if you do well, you can be elitist about it and critique other peoples' proofs in the same way lmao

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oh but seriously, if you're in math the proofwriting is obviously very important, but if you're in cs, if you come up with a new algorithm or encryption protocol etc., you can write an accompanying math paper to prove its efficiency and efficacy

dusk pilot
#

man, i wanna finish this course and never think about this again. I spend so long going to math labs and whatnot to try and finish hw and portfolios and still dont understand a single thing to retain it but enough to get the work done

jagged harbor
#

the vibe seems to be that discrete math is just the vessel through which proofwriting and logic is taught to students who have previously never been asked to prove anything, ever

dusk pilot
#

i understand how proofs works, its just discrete math vocab if that is the right term is just so tedious, it flies over my head for some reason

jagged harbor
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that's all vocab honestly

dusk pilot
#

anyway, i should get back to finishing this stuff. thank you for the help again

jagged harbor
#

no problem, have fun

devout snowBOT
#

@dusk pilot Has your question been resolved?

#
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#
Available help channel!

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Ask your math question in a clear, concise manner.
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After 15 minutes, feel free to ping <@&286206848099549185>.
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small whale
#

have I done something wrong? how do I continue from here?

shadow brook
#

When you got rid of the square root you removed a tan.

small whale
#

well yeah

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it was tan^2 x

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like

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sqrt(tan^2 x) = tanx no?

shadow brook
#

There’s another tan x in that expression.

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So you really have tan squared when the dust settles.

small whale
#

oh oops

#

well I don’t think I can integrate this

#

yes I can I’m lying

shadow brook
#

You certainly can. Where are you stuck?

#

Ah.

small whale
#

nvm I lied again

#

u-sub is not working out

shadow brook
#

Where are you stuck this time?

small whale
#

would this work …

#

I haven’t a clue

shadow brook
#

I just deleted my message because it was STUPID

#

Try to use an identity here

small whale
#

ahhh wire

#

secx = 1/cosx

shadow brook
#

To be honest, this is still hard to integrate.

#

I was hoping to change the integral to 16(sec^2 - 1)sec^2

#

You then have to integrate sec^3 which will require some IBP.

small whale
#

book doesn’t integrate so that means I shouldn’t right‼️

shadow brook
#

I assumed the point of the problem was an integration exercise!

#

Umm… did the book just leave it there

small whale
#

well yes

#

and then went on the show a few more then examples

shadow brook
small whale
#

I don’t think I wanna 😭😫

shadow brook
#

But maybe it’s just trying to show you the situations in which you should think of a trigonometric substitution?

small whale
#

perchance

#

These are the rest

#

maybe I WILL get an answer at some point

#

but thank u for the help

shadow brook
#

If you know about hyperbolic functions, a hyperbolic substitution is much easier.

small whale
#

as a matter of fact I do not know hyperbolic functions

shadow brook
#

Ah. Essentially, these functions are versions of sine and cosine but they parametrise ‘hyperbolas’ instead of circles. If you don’t know about them, then I guess you do only have one way to do it

small whale
#

I’ve given up with actual answers and I think I’m just gonna leave them as integrals

shadow brook
#

I do believe that is probably the intention

small whale
#

I done some before

#

and in those I was actually getting answers

#

but they are a little different

#

and just to check

#

that answer is correct right…

shadow brook
#

Differentiate it and see what you get!

#

But yes that’s right

small whale
#

Lord don’t make me differentiate all at

#

But ty

#

so much

#

🙏🏻

#

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mortal tinsel
#

I am proving that if a function is entire, then there exists a function F such that F'(z) = f(z).

I begin by defining $F(z) = \int_0^z f(z) dz$

Then taking the derivative we get

$$F'(z) = \lim_{h \rightarrow 0} \frac{1}{h}[F(z+h) - F(z)]$$
$$ = \lim_{h \rightarrow 0} \int_z^{z+h} f(z) dz$$

Which by the MVT for integrals is

$$f(c)(z+h-z) = hf(c)$$

So the h's cancel and you get

F'(z) = f(c) for some $c$ in that range, however how do I conclude that its eqal to f(z)? Do I just use the fact that the h in the bound approaches 0? Then I can't use MVT

woven radishBOT
#

Bean Man

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mortal tinsel
#

<@&286206848099549185> please

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thin crest
#

F(x)= 1/(x-6)^2 How would i go about getting the derivative of this

acoustic leaf
#

chain rule

thin crest
#

How is that done i forget the names of the formulas

acoustic leaf
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devout yarrow
#

the reduction formula isnt something ive learnt; how can I integrate (tan^2x)/(cosx); and if it's a u sub of sec^2 or tan how would i know generally what one to make?

tropic skiff
woven radishBOT
#

King Leo

tropic skiff
#

Then use $u = \tan(x)$

woven radishBOT
#

King Leo

devout yarrow
#

nvm

tropic skiff
devout yarrow
#

what do i do next?

tropic skiff
#

And what integral exactly are you trying to solve

devout yarrow
#

original integral

tropic skiff
#

Oh wait

#

Im selling

#

No wai

#

Youre selling

#

No wait

#

Wtf

#

Im selling

#

,w derivative tan(x)

#

,w derivative sec(x)

devout yarrow
#

so... sec x is sqrt du?

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#

<@&286206848099549185>

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opaque helm
#

We have a vehicle at (0, 0). It can take 6 movements to NSEW, but it must end up back at (0, 0). What are the total number of unique paths it can take? I was having a lot of trouble with this problem on my midterm.

opaque helm
#

The solution I got was fixing 2 positions out of 6, then out of 4, and selecting an axis for each combination.

#

So I got 2nCr(6, 2) * 2nCr(4, 2) * 2nCr(2, 2). Then added for fixing 3 positions out of 6, which was 2nCr(6, 3).

#

So my final solution was 2nCr(6, 2) * 2nCr(4, 2) * 2nCr(2, 2) + 2nCr(6, 3).

#

Did I overcount when multiplying nCr(2, 2) by 2? But for these positions, there’s still two axes of movement to select.

low sentinel
opaque helm
#

But I didn’t multiply against 2! to prevent overcounting

low sentinel
#

ahh ok

opaque helm
#

Does anyone have a solution?

opaque helm
#

How??

low sentinel
#

3 North, 3 South: 6! / (3! * 3!) = 20
3 East, 3 West: 6! / (3! * 3!) = 20
2 North, 2 South, 1 East, 1 West: 6! / (2! * 2! * 1! * 1!) = 180
1 North, 1 South, 2 East, 2 West: 6! / (1! * 1! * 2! * 2!) = 180

opaque helm
#

Damn

#

So I only got the 6 choose 3 portion correct

#

Yeah I overcounted on 2nCr(2, 2) 🤦‍♂️

#

Thank you anyways

#

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devout yarrow
#

i cannot comprehend the step to give 2x on top 🤦‍♂️

jagged harbor
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digital egret
devout snowBOT
digital egret
#

I have no clue how to do this

alpine gulch
#

can someone help me, please?

faint gorge
devout snowBOT
rapid merlin
#

Because there is no mention of the matrix A here

digital egret
#

oh i can send a picture of what A is

#

M is

#

yeah maybe ill try to figure on my own idk how tis work

#

like this is what i have

#

I know the answer i just dont know how to get it

#

this is A

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copper ibex
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copper ibex
#

how do u evaluate a limit like this?

#

because direct sub will give 1/0

solar goblet
#

therefore DNE

copper ibex
solar goblet
#

+infty is a form of DNE

copper ibex
#

oh ok

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quasi agate
#

Q1a

I believe I can use kirchoff’s current law, but I’m not sure how to progress from there

Do I use the current equation for the inductor L

Or is this more appropriate for the physics discord

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cold rivet
#

Can someone explain to me how the Monty Fall problem is different to the Monty Hall problem? It seems that in both we are given that Monty opens a dud door, so where is the difference?

pseudo basin
#

can you state both problems

#

so we are all on the same page about them

solar goblet
#

wtf is a monty fall problem

pseudo basin
#

i also wanna know

dark tundra
#

I was gonna joke that the Monty Fall problem was Monty Hall tripping down the stairs of the LMAD set

#

But uhh

#

it actually is lmao

cold rivet
#

It's just the Monty hall problem but he opens the door to the goat by accident

pseudo basin
#

ngl i also don't quite see where the difference is

cold rivet
#

Yes there is an argument about it

#

People say that if he randomly opened a door then it's no new information and you should stay with your original choice

#

However the problem is stated as if it's given that he opens a door with a goat

#

Does that affect things?

pseudo basin
#

actually i think i got it

#

the difference from the original MH is that the host weights the sub-branches for Car 2 and Car 3 differently

#

being 1 for the goat door and 0 for the car door

devout snowBOT
#

@cold rivet Has your question been resolved?

neat solstice
#

I think 2 cases

  1. he opens our door
    Car -> we win
    Goat -> switch then 50/50
  2. he opens another door
    Car -> we win
    Goat -> should be as before 2/3 if we switch
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patent notch
#

guys i got an answer to a question but its wrong

patent notch
#

idk how i gto it wrong

#

i got 1.31 and the answer says 2-1/3 ln2

distant helm
#

don't approximate 😩

#

,w 2-1/3 ln2

woven radishBOT
patent notch
#

the approximation there is the answer my calculator gave (the 1.76 one)

#

but i was like .4 out

distant helm
#

send your work

patent notch
little totem
#

what is this handwriting

patent notch
#

LOL

little totem
#

what is this

distant helm
#

wrong

patent notch
distant helm
#

this is very wrong

patent notch
#

oh

little totem
# patent notch -1

then you need to learn to use better handwriting because thats your own -2

little totem
little totem
#

yes, you need to fix your own handwriting before it bites you in the ass

patent notch
#

its better than this in school i promise

little totem
#

well the point is that you need to make it a habit or else it will bite you in the ass

#

in math, your handwriting doesn't need to look pretty, it only needs to be perfectly legible

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#

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devout snowBOT
#

@patent notch Has your question been resolved?

marble lily
#

@patent notch

#

From here you need to put 1/3 out of the primitive

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patent notch
#

TYSMM

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queen onyx
devout snowBOT
queen onyx
#

what after this??

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#

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queen onyx
#

<@&286206848099549185>

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thin coyote
#

I tried twice but I don't get the correct result. The first part in the bracket I get 0.454, while the second is 1.999. After multiplication with 4.3 I get -6.647

pseudo basin
thin coyote
#

approximations

pseudo basin
#

why?

#

you are supposed to be working with exact values all throughout

thin coyote
#

I mean I calculate and take 3 numbers after the . if thats what u mean

pseudo basin
#

anyway, we need to see all of your work to diagnose what is wrong with it -- your answers for the two penultimate steps don't tell us much

pseudo basin
thin coyote
#

how should i approach it then? If i go with fractions and not with decimals numbers are just too big

#

sorry if my english is bad for math lol

pseudo basin
#

you need to do it with fractions, but i am pretty sure you can simplify things along the way so they never get too big.

thin coyote
#

I'll try with fractions rn

pseudo basin
#

show all your work and not only the answer

thin coyote
#

I'll take a picture when i finish with fractions

pseudo basin
#

k

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sour spire
#

guys, how to know which method to use for this question? is it the left one or the right one?

sour spire
#

based on the mark scheme, the correct one is the left one

north roost
#

shouldnt it be the same?

#

the right one did the integral wrong

sour spire
winter patrol
#

you have an extra 1/2 in the second term

versed garnet
#

HI guys

#

yh

sour spire
#

thank you sooo muchh guysss!

sour spire
versed garnet
#

u got ur help

#

😉

sour spire
#

yes!

#

thanks!

#

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keen dust
#

my answer: (including image) In measure 2, where a subsidy of s euros is given to sellers so that the price for the buyer is equal to pmax, this causes an increase in both the producer surplus and the consumer surplus, it also causes a shift downwards/to the right of the supply curve of size s, (the size of s is 20, because the subsidy applies to suppliers from q = 10 up to q = 30, 30 – 10 = 20.)
From q = 30, the new equilibrium is reached. And consumers are no longer willing to buy a house above p_max.
The deadweight loss is formed at i. These DWL represent buyers who buy a house that they normally would not have paid that much money for. The government subsidy runs from q = 0 to q = 30 with a height of 20, (pmax to pmax + s )

Consumer surplus in market equilibrium: A + B + D
Consumer surplus after subsidy: A + B + D + E + F + H
Producer surplus in market equilibrium: C + E + F
Producer surplus after p_max: C + E + F + B + D + G
Welfare: A+B+E+C + D + F + G + H - I
Deadweight loss: -i = change in welfare = -DWL
Government Costs = B + E + D + F + G +H + I

The original question:
In recent years, the price of owner-occupied homes has risen dramatically, making it a problem for
starters1 in particular to find an (affordable) owner-occupied home. The government is
therefore considering measures to accommodate starters on the housing market. Two possible
measures are: 1) setting a maximum price pmax for owner-occupied homes; 2) giving a
subsidy of s euros per home to sellers, such that the price of a home becomes equal to
pmax.
c) (4 pts.) Use the analytical framework from Chapter 9 to
analyze and compare the effects of both measures. Assume that the owner-occupied homes are all identical.
In your analysis, specifically address the welfare effects for buyers of owner-occupied homes,
providers of owner-occupied homes, and the government.

keen dust
#

My question is, is the subsidy rectangle right? i'm conflicted between D + F + G + H + I and B + E + D + F + G +H + I

#

i'm also not sure if I got the welfare effect right

#

Also I'm not even sure if the subsidy makes sense, here in my image, because the measure 2 is proposing a subsidy to the point it reaches p max, for each home for the seller. where (I believe) the buyer pays (up to?) pmax.

#

but then the subsidy would go beyond q = 30 right? so idk im stuck

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@keen dust Has your question been resolved?

keen dust
#

<@&286206848099549185>

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devout cipher
devout snowBOT
devout cipher
#

nevermind i figured it out

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inner ibex
#

hii

devout snowBOT
inner ibex
#

where did the b^2 come from?

#

in part b

#

a^2 + a - b^2

#

i got a^2 -b + a

distant helm
#

,w (a-bi+1)/(a+bi)

woven radishBOT
distant helm
#

bruh nvm

inner ibex
#

wat

#

OHHH

#

b^2i^2

#

ohh

#

ok thanks

#

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valid gale
#

What is x²+y² while x+y= 5*√2 ,x*y=6?

devout snowBOT
tranquil bloom
#

(x+y)^2=x^2+y^2+2xy

valid gale
#

Does it become 25*2-12?

#

And the final answer would be 38?

violet umbra
#

Yes. 25*2=(x+y)²=x²+y²+2xy=x²+y²+12 -> x²+y²=50-12=38.

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static pivot
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I dont know what mistake im doing

devout snowBOT
static pivot
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dont mind the bottom trig stuff

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just fixed the sign mistake above, still not right

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I might have figured it out?

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in the process, I have to solve for dx

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which is going to be du/cosx

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right?

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nah, it was the same thing i was doing, just explained better

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help ;-;

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static pivot
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.close

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thin geode
devout snowBOT
thin geode
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Not sure if im right

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But im stuck on this question

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willow harbor
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Hello!

I will spare you the background information, if you want it go ahead and ask and i can shortly explain it

Question:

Imagine two circles that do not have the same radius placed at constant distance from each other connected through a rod that has constant length. If you rotate the larger circle (or the smaller one, doesn't matter) how much will the smaller circle rotate?

I know that the circles can't do a full rotation but there must be some formula to describe their movement in the part of the rotation where they can move.

I have tried describing the connecting rod in terms of the known variables, R, r, D, L but I get en expression that seems a bit too convoluted

willow harbor
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Here is a sketch of the problem

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And my current progress

sinful fable
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Which is the rod in your figure?

willow harbor
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The blue lines

sinful fable
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Aah ok

willow harbor
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Sorry hope it is clearer now

sinful fable
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A relation between alpha and theta is reasonable

willow harbor
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You think?

sinful fable
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You can assume a coordinate plane and parametric coordinates,

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Then you would technically have the equation using distance formula

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It would be ugly but you would have it

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Maybe a more cleaner relation between d(alpha),d(theta) is what you want?

willow harbor
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Yeah i would like to specifically have a function alpha = f(theta)

sinful fable
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Are alpha and theta changes/ how much they rotate by?

willow harbor
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yeah i guess

willow harbor
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So maybe saying delta_alpha = f(delta_theta) would be better

sinful fable
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Im not convinced such a function would exist,i mean just intuitively, like suppose it changed by delta theta at first and then changed by it again, intuitively feel like alpha would be different

willow harbor
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yeah most definitely

Right now i am doing it using numerical methods in matlab and the change in angle is not constant

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But it would be nice to have an analytical solution instead, or atleast one that doesnt use guesses

sinful fable
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You can relate just alpha and theta

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Using coordinates,its fairly easy

willow harbor
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So without any change?

sinful fable
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Yeah

willow harbor
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Yeah that i have figured out already

sinful fable
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Which is basically what you have done

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Yeah

willow harbor
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One last question then

sinful fable
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No you can ask someone else,i was just discussing

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Got curious

willow harbor
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ah well

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I will wait and see if anyone else comes then 🙂

sinful fable
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Btw i do think a differential equation is possible which would be satisfactory

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I do*

willow harbor
# willow harbor

Do you think the bottom expression here would give an answer if i were able to solve it?

sinful fable
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Yeah seems good

willow harbor
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I will try to stick it into matlab then 🙂

sinful fable
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After that you can implicit differentiate to get the differential

frozen aurora
willow harbor
frozen aurora
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in a bit more detail

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if you start like this in EF then you can't move it as to rotate the circles you will need something of length more than 5

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if you start out with an initial config like this, where EF is more than 5, then it seems like there's too much freedom

willow harbor
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Yes
That position will never happen in my model
This is a mechanical issue to begin with and i know there are limits

willow harbor
frozen aurora
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like there will be many possible cases and configurations that are kinda hard to categorize

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at least the way i see it rn

willow harbor
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I can try to narrow it down

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And draw it how it will look on the model 🙂

frozen aurora
frozen aurora
willow harbor
willow harbor
willow harbor
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There we go 🙂

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Is you can see it breaks on some angles
Which is completely fine, it would almost be great if that showed in the final function because then i know the measurements are incorrect

devout snowBOT
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@willow harbor Has your question been resolved?

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@willow harbor Has your question been resolved?

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misty granite
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Okay I’m just stuck on a easy trig question I’m trying to find angle c

misty granite
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I mean this is easy but I haven’t done trig in ages kongouderp

iron kindle
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rewrite to sin(c)=?

misty granite
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Yeah

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So

iron kindle
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what do you get?

misty granite
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C=56.755 degrees

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But the annoying thing is

iron kindle
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not what i was asking for

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but sure

iron kindle
misty granite
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The corresponding angle is not accurate

iron kindle
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is your calculator on radians?

misty granite
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Degrees

iron kindle
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i mean, the angles check out

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your drawing is just shit 🙂

misty granite
iron kindle
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98.65+56.75+24.6=180

misty granite
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Nah but the sides

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Are not suppose to exist

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Isn’t the largest angle=largest side

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And smallest angle=smallest side

iron kindle
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yes

misty granite
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So why 98.65=7 and 56.75=11

iron kindle
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,w asin(11/5.475*sin(24.6 degrees)

iron kindle
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,w 0.9906 radians to degrees

iron kindle
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hm

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,w asin(7/5.475*sin(24.6 degrees))

iron kindle
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,w 0.561234 radians in degrees

misty granite
iron kindle
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hmm

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!original

devout snowBOT
#

Please show the original problem, exactly as it was stated to you, with the entire original context. A picture or screenshot is best. If the original problem is not in English, then post it anyway! The additional context might still be helpful. Do your best to provide a translation.

misty granite
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I don’t have OG, it’s:triangle abc is a non right triangle. Side c measures 11 and side a measures 7. Angle B measures 24.6 what is angle c?

iron kindle
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so where did you get 5.475 from?

misty granite
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Law of cos

iron kindle
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,w 11/5.475*sin(24.6 degrees)

misty granite
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11^2+7^2-2(7)(11)cos(24.6)

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Then square root

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Netting 5.475….

iron kindle
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,w sqrt(11^2+7^2-2(7)(11)cos(24.6 degrees))

misty granite
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I think I know

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So after this

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I realized the mistake

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I think I treated this like a ssa or ass case

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So I did 180-56.75

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And got 123.244

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And it just worked

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So I think it’s just 123.244

iron kindle
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okay

misty granite
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I’m not certain though

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Law of cos if I recall does create a ass case right

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It’s been so long since I’ve done trig

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Yeah I think it’s accurate

iron kindle
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if it works, it works

misty granite
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Idk…?

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Cause it just asked for angle c

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Not sure

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.close

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humble dirge
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i'm confused how a square root of a square root work

humble dirge
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i have the question sqrt of sqrt of x^12 and it asks to "write a simplified equivalent expression using exponents"

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and the answer is x^3

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how does that work?

restive river
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you can express a square root as 1/2

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as in, square root of x = x^(1/2)

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sorry if my handwriting is a little rough but there's an example

humble dirge
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i see

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so the square root of x^12 would be x^12(1/2) which is x^6

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and then you just do it again to get x^6 to x^3

restive river
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u got it

humble dirge
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sweet

restive river
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yes

humble dirge
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thanks mr apple