#help-33

1 messages · Page 13 of 1

still temple
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the relationship of what

spark berry
spark berry
spark berry
still temple
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x and y valuess show the relationship of the function

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this is what ur saying?

spark berry
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YES

still temple
#

HOW DOES THAT EVEN MAKE SENSE

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WTF

spark berry
#

For example
X=1, and y=1, what do you think is the relationship between the two?

still temple
#

they both equal 1

spark berry
#

x=2, and y=2

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x=3, and y = 3

still temple
#

they both erqual 2

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and 3

spark berry
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So they do have a 1 to 1 ratio

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so it's x=y

still temple
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yes

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yes

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so what are you trying to tell me

spark berry
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That you can able to see what function are we using using only the x and y values

still temple
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YES EXACTLT

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i know that

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function= relation

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ok so f(x)=y

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x=1

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y=2

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f(1)=2

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what the hel

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so f=2

spark berry
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Yes

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YES

still temple
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isnt that emma watson

hollow sparrow
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whoah lmao

still temple
#

ok ill try to understand what u just said

spark berry
still temple
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relation=output

spark berry
#

Nah, output and input shows the relation

still temple
#

i will write down

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why

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f(x)=y

spark berry
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If you have both of those, then you can see the relationship

still temple
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f(x)= function

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y=output

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functin= relation

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output=relation

spark berry
# still temple f(x)= function

This isn't the function. It's the output also
It would only be a function if there's an equation to the other side
We just call it function of x

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f(x) = x -> function

still temple
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DUDE

spark berry
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f(x) -> output

still temple
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WHY DO U KEEP CAHNGING UR ABNSWER

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A FEW MINUTES AGO

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U TOLD ME F(X)= FUNCTION

spark berry
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I JUST TOLD YOU EARLIER THAT F(X) IS JUST WHAT WE CALL THE FUNCTION OF X

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NOT F(X) = FUNCTION

still temple
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BEFORE THAT

spark berry
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SEE

still temple
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NONO

spark berry
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LOOK AT THE TIME

still temple
#

ur only getting the ones that say that

spark berry
#

O I forgor we have different time

nova crescent
#

Brahs function is just a machine that gobbles up a values and spits out y values

still temple
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and the rewlation

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is a equation

still temple
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and this guy is telling me that y values is a realtion

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relation

nova crescent
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yeah f(x) is notation for a function

spark berry
still temple
spark berry
nova crescent
#

Y value is relation because y is a variable just like x and they are related to each other. For example y = x is a relationship that means y and x are equal

still temple
#

the relation of functions

spark berry
#

You even get it at first

nova crescent
spark berry
spark berry
#

BRUH

nova crescent
#

F(x) can often be interpreted as y, but in some cases y can only be described as having a relationship with x, but not a function

still temple
#

THATS WHYTEHEERE IS A QUESTION MARK

nova crescent
#

Bro what are you smoking guys

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I need some of that

still temple
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ok

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so f(x)

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is a function

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yes?

nova crescent
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Yes

still temple
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so function = y values

nova crescent
#

Ye

still temple
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y=2

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function=2

nova crescent
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Could also be z values, a valued, any other variable values

nova crescent
still temple
#

i dont even know what u are saying anymore

nova crescent
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Hm

still temple
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my brain is so fogged up rn

nova crescent
#

I think it's useless to be so strict on the difference between y and f(x)

still temple
#

cause of this guy @spark berry

nova crescent
#

You can just view them as the same thing and in years you will see the difference

still temple
#

so would that mean

nova crescent
#

Before that I doubt school will teach you anything weird

still temple
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x values are also a function

nova crescent
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Well

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Functions have inputs and outputs. If you're inputting y and outputting x that's possible. To write the function you would write f(y) instead of f(x) since the variable you're inputting is y now, not x

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The thing in the parenthesis is just the input of the function

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But normally school will only give y values as the output and x as input

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It's just the standard

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It could be anything tho

still temple
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hmm

nova crescent
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Your variables can be a and b

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Doesn't matter it's just a notation

still temple
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ok so

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f(x)

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and x =1

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= f of 1 or f(1)

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does that mean y=1?

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wait

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no

nova crescent
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f(1) yes

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Orally you would say f of 1

still temple
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no

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that wouldnt make sense

nova crescent
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Well you haven't defined what the function is yet but if the function was f(x) =x AKA y = x, if x is 1 then y is indeed 1

still temple
#

i think imma just take a little break then come back and read what u guys said currently i dont think my brain can process anymore information

nova crescent
#

If it were y=2x AKA f(x) = 2x, your y value at x= 1 would be 2. You would denote that as f(1) = 2

still temple
#

tysm @spark berry and @nova crescent luv u guys for helping me :)

#

.close

marsh citrusBOT
#
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jolly nebula
#

How to get the percentage error?

marsh citrusBOT
still temple
#

$\frac{|Experimental-Theoretical|}{|Theoretical|}*100$

elfin berryBOT
jolly nebula
#

How can i tell whats experimental and theoretical, sorry getting percent error is new to me

still temple
#

the experimental is the calculated value, the theoretical is the known value (not sure though trying my best to remember)

jolly nebula
#

So based on my given table, the gcal is the experimental while the -9.8 is the theoretical?

still temple
#

from what I understand yeah

jolly nebula
#

Alright thanks

marsh citrusBOT
#

@jolly nebula Has your question been resolved?

marsh citrusBOT
#

@jolly nebula Has your question been resolved?

marsh citrusBOT
#

@jolly nebula Has your question been resolved?

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thin bison
#

Hello

marsh citrusBOT
elfin berryBOT
#

Basudev

thin bison
#

How is this??

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I don't see any way that I can simply

elfin berryBOT
#

Basudev

stoic saddle
#

n! = n * (n-1) * (n-2)!

thin bison
#

Yes

stoic saddle
#

so

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$\frac{n \cdot (n-1) \cdot (n-2)!}{2! \cdot (n-2)!}$

elfin berryBOT
thin bison
#

Oh

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Thanksn

#

Got it

#

.close

marsh citrusBOT
#
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still temple
marsh citrusBOT
still temple
#

Anyone know how to do this?

marsh citrusBOT
#

@still temple Has your question been resolved?

marsh citrusBOT
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vivid axle
#

Been stuck on this question for a solid 3 days now. Tried using the hint in order to get some sort of log odds to help out with getting the answer...still not entirely sure on how I'd even do it.
3rd year university, Machine Learning, Discriminant Analysis + Bayes Theorem

Anyone able to help me out with this hellish question?
I've managed to get some form of log odds but it doesn't look like I could rearrange it to get the form they've requested in the question.

vivid axle
#

Glad to see someone reacted to this KEKW

placid oak
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you're welcome!

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im most sure nobody would help you here

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you can try the data science server

vivid axle
#

I'll have a look and hope

placid oak
vivid axle
#

Will do
It's pretty messy (and I'm not brilliant at ML so be warned)

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This is as far as I’ve got. Feel free to pick through everything and…yeah

solid echo
#

I'm not brilliant either, but I'm telling you to show your work, which will attract more attention to your question

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Are you labelling the first term as $\theta_n$?

elfin berryBOT
solid echo
#

You want the whole thing as $\theta_0, \dots, \theta_n$

elfin berryBOT
vivid axle
#

I thought the first term would be able to get me thetan but there's no x in that term. So in the second image I've converted to use the whole term, combined into just thetan where it's the sum from j = 1 to n of thetaj

solid echo
#

The terms corresponding to independence of $x$ is $\theta_0$

elfin berryBOT
vivid axle
#

That makes sense

#

Mostly from linear regression which we did a fair amount, not all terms have x in them but all but one do. As shown as well with the sigmoid function.
Still wondering how I'd go from what I've got to get the sigmoid which is the main thing confusing me

marsh citrusBOT
#

@vivid axle Has your question been resolved?

marsh citrusBOT
#

@vivid axle Has your question been resolved?

vivid axle
#

<@&286206848099549185>
And of you guys able to assist me?

marsh citrusBOT
#

@vivid axle Has your question been resolved?

marsh citrusBOT
#

@vivid axle Has your question been resolved?

pale rune
#

I Need Help With This

worthy trellis
marsh citrusBOT
#

@vivid axle Has your question been resolved?

plush condor
# pale rune I Need Help With This

When I understand it right you have to look at these points, imagine there is a coordinate system and you've learned that no y in a function has two different x points

still breach
#

i’m handicapped

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i can’t move my penis

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it’s a condition

vivid axle
#

Yes I’m still in need of some help with this question.
Please nobody else just but in and post their own question or random comment.

shadow relic
pale rune
#

.close

shadow relic
#

You have (6,5) and (6,-9)

vivid axle
marsh citrusBOT
#

@vivid axle Has your question been resolved?

rough owl
#

i calculated i^2, j^2, k^2, ijk but i dont know what to do next

rough owl
#

<@&286206848099549185>

gentle sierra
gentle sierra
rough owl
#

Alri

marsh citrusBOT
#

@vivid axle Has your question been resolved?

olive timber
still temple
#

hi

marsh citrusBOT
#

@vivid axle Has your question been resolved?

lapis cosmos
#

so calculate the general form for q

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then test the answers to see which is the inverse

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ill have paper in a few min

frail summit
#

can someone help me?

stiff bear
#

@frail summit for what

hollow kettle
#

.close

vivid axle
#

.close

marsh citrusBOT
#
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drifting crown
marsh citrusBOT
drifting crown
#

can anyone help me with the statistics problem

stoic saddle
#

sigma is not 1.2

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sigma is unknown

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it's the z-score of this particular can you grabbed that is 1.2

drifting crown
#

but it says standard deviation is 1.2

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why can’t we use it as sigma

stoic saddle
#

no,

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it says

A randomly selected can [...] is 1.2 standard deviations above the mean.

drifting crown
#

i got it

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so sigma is 1.67

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How can I know the percent xxx

warped wind
drifting crown
#

Oh

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so i search the table A

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0.8849

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then 1 minus it?

stoic saddle
#

you want to know the percentage of values with z-score 1.2 or above

warped wind
#

Anything above 1 standard devatiation from the mean is approx 13.6% + 2.1% + 0.1% ≈ 15.8%. Then because it's 1.2 standard deviation it's a little bit less than this

stoic saddle
drifting crown
#

got it

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thanks

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and i was also confused with this question

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Why D is not right

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@stoic saddle 😭

stoic saddle
#

"lower pulse rates than 3/4 of the women" refers to values below the bottom of the box in the women's column

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and that doesn't cover half of the men

marsh citrusBOT
#

@drifting crown Has your question been resolved?

marsh citrusBOT
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wary bluff
#

I was j wonderin but if u have a function (f(x))/(g(x)) and u want the derivative. Instead of quotient rule couldnt u use the extended power rule aswell?

wary bluff
#

so like move g(x) up with and turn the power negative

devout mauve
#

And then product rule, yes

bleak ibex
#

yes, if you don't forget to use the chain rule

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and product rule

devout mauve
#

That is how the quotient rule is derived

wary bluff
#

ohh

#

I see

#

bet ty

#

.close

marsh citrusBOT
#
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still temple
marsh citrusBOT
still temple
#

sin3x+sin(2x+pi/3)=0

#

i can do 3x+2x+pi/3=0 ?

twilit arrow
#

yes

still temple
#

@twilit arrowthe answer is -pi/15 ?

twilit arrow
#

i don’t believe it’ll give you all solutions though

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that’s one solution

still temple
#

how i can get the solution with npi

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@twilit arrowhey

twilit arrow
#

i’m not sure

still temple
#

sure of what

twilit arrow
#

how to find all solutions

still temple
#

i have the answer on my werkbook but i dont know how to get it the answer is 2kpi/15 @twilit arrow

#

wait

#

.close

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gray shale
#

when we have sin(arcisin(x)) = ...
we have to verify that x€[-pi/2; pi/2]

but when it's tan(arctan(x)) = ... we don't need to verify an angle right?

wet zenith
#

Huh?

#

That does not look right

sweet pawn
#

,w range of arctan(x

wet zenith
#

sin(arcsin(x)), x would be in [-1,1]

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But x has to satisfy the arcsin domain

gray shale
fallen galleon
#

damn Mr gamer is truly a gamer

wet zenith
#

tan(arctan(x)), here x can be anything, but i dont understand your question

sweet pawn
#

x can be any real, but its arctangent only returns angles of the right half of the circle

#

I hope that clears things up

wet zenith
#

tan(arctan(x)) just be simplified to x, same for sin(arcsin(x)), provided that x satisfy the original domain

gray shale
#

no i mean for instance you have to verify that arcsin(2x) - arcsin(xsqrt((3)) = arcsin(x)
then you apply the sin function but since sin is 2pi periodic you have to verify that inside the sin it's between -pi/2 and pi/2

#

so my question was what the angle when we apply tan

marsh citrusBOT
#

@gray shale Has your question been resolved?

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timber python
#

I'm very confused when it comes to JK flip-flop
How can i solve this

marsh citrusBOT
#

@timber python Has your question been resolved?

timber python
#

no

marsh citrusBOT
#

@timber python Has your question been resolved?

timber python
#

<@&286206848099549185>

marsh citrusBOT
#

@timber python Has your question been resolved?

marsh citrusBOT
#

@timber python Has your question been resolved?

marsh citrusBOT
#

@timber python Has your question been resolved?

silk vector
marsh citrusBOT
#

@timber python Has your question been resolved?

vague vector
#

.close

marsh citrusBOT
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signal ferry
#

If U1 = 1 and U2 = 2 and U(n+1) - 2Un + U(n-1) = 1. find U1000 the 1000th term of the sequence .

signal ferry
#

Hey guys which one is the correct answer U1000 = 499501 or U1000 = 1000?

marsh citrusBOT
#

@signal ferry Has your question been resolved?

wooden oriole
#

$$u_{n+1}-2 u_{n}+u_{n-1}=1 \implies (u_{n+1}-u_n)-(u_n-u_{n-1})=1$$

elfin berryBOT
#

秋水

wooden oriole
#

so ${ u_n-u_{n-1}}$ is an arithmetic sequence with common difference $1$, and $u_2- u_1=1$, so $u_n - u_{n-1}=n-1$

elfin berryBOT
#

秋水

wooden oriole
#

$$\begin{aligned}
u_{1000} &= (u_{1000}-u_{999})+(u_{999}-u_{998})+\dots+(u_2-u_1)+u_1\
&=999+998+\dots+1+1 \
& = \frac{1000 \times 999}{2}+1\
& = 499501
\end{aligned}$$

elfin berryBOT
#

秋水

marsh citrusBOT
#

@signal ferry Has your question been resolved?

#
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boreal summit
marsh citrusBOT
boreal summit
#

how would i go about solving this?

devout hatch
#

so it is saying x is not a negative number

#

and that x is smaller than 2 pi

boreal summit
devout hatch
#

just punch it into a calc

#

no way to do it mentally

#

x is 0

boreal summit
#

no offense but that cant be right

#

what have i been learning this whole time 😭

devout hatch
#

x is 0

#

100%

wooden oriole
#

$$\sin x+\cos x=\sqrt{2}\sin(x+\frac{\pi}{4})$$

elfin berryBOT
#

秋水

devout hatch
#

sin 0 is 0

#

cos 0 is one

boreal summit
#

i found that x=0, but looking at the answers says that there are 2 other answers, pi/2 and 2pi

devout hatch
#

nono

#

it says x is = or greater than 0

#

and less than 2 pi

boreal summit
#

wait am i like actually dumb

#

lemme check again

#

i put in cos(0) + sin(0) into my calculator and it comes out as 1

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so like yeah x=0

#

but how did they get the other values?

devout hatch
#

its jsut saying that

#

0 is the answer

boreal summit
#

im getting so confused rn

devout hatch
#

same

boreal summit
#

so 0 is one of the answers?

devout hatch
#

0 is the only answer

boreal summit
#

💀

wooden oriole
#

the answer is x=0,pi/2,2pi

boreal summit
#

but how

devout hatch
boreal summit
#

i dont get how

wooden oriole
#

$$$$\sin x+\cos x=\sqrt{2}\sin(x+\frac{\pi}{4})=1$$

elfin berryBOT
#

秋水
Compile Error! Click the errors reaction for more information.
(You may edit your message to recompile.)

wooden oriole
#

so $\sin(x+\frac{\pi}{4}) = \frac{1}{\sqrt{2}}$, and $x+\frac{\pi}{4} \in [\frac{\pi}{4}, \frac{9 \pi}{4}]$

elfin berryBOT
#

秋水

boreal summit
devout hatch
#

i gtg now

#

a

wooden oriole
#

so $x+\frac{\pi}{4} = \frac{\pi}{4}, \frac{5 \pi}{4}, \frac{9 \pi}{4}$

elfin berryBOT
#

秋水

boreal summit
#

could you walk me through this question?

#

@wooden oriole

wooden oriole
#

$$2 \sin x+3\cos x = \sqrt{13}(x+\arctan \frac{3}{2})$$

elfin berryBOT
#

秋水

boreal summit
#

HOW

#

wait maybe i remember

#

hold on

#

ok where did arctan 3/2 come from?

#

i get the root 13 part tho

marsh citrusBOT
#

@boreal summit Has your question been resolved?

marsh citrusBOT
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still temple
#

How would I find the maximum point for this equation?

still temple
#

where e is euler’s number btw

marble glacier
still temple
#

Wdym?

#

I have it graphed and can find the point that way but I need the process

marble glacier
#

Plug in a massive number

#

but thats literally how i would do it

still temple
#

Alr I’ll try

wind wadi
#

You basically have the function f(t) = A(1 - e^(-6t)) - Bt where A & B are constants.
You can find the max by finding critical points using the derivative

still temple
#

Yeah that makes more sense thank you I understand now

#

I don’t know how to mark as solved lol

#

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torn veldt
#

How should i work out d and e?

marsh citrusBOT
still temple
#

first of all

#

whats 8% of 20,000

torn veldt
#

so 10% is 2000 minus 1% twice which is - 400, so its 1600

#

is that an okay way to work it out?

torpid anvil
#

Do you have a calculator

torn veldt
#

Well yeah

torpid anvil
#

Use that

torn veldt
#

What should i do on the calculator?

torpid anvil
#

Find what 8% of 20000 is

#

Or actually forget tha

#

Just type 20000(1.08)^x until you reach somewhere near 30000

torn veldt
#

so 6 times then its above 30k

torpid anvil
#

Yeah

torn veldt
#

So should i just write 20000*(1.08)^6 power as my working out

torpid anvil
#

Write after six years

#

Or just six years

torn veldt
#

Okay and for question e?

torpid anvil
#

Bruh

#

I literally just gave you the equation

torn veldt
#

Ooh okay i think i understand thanks

torpid anvil
#

👍

torn veldt
#

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upper gust
#

does every exponential function eventually outscale every linear function

upper gust
#

if the exponent is bigger than 1

spark otter
#

Are you thinking of |exp(a)| > |a| ? depends on the norm you choose

#

It is generally false as well, just look at an example over the real numbers with a = -1

wind wadi
#

i think they mean linear functions with degree 1 and a > 1

#

such as a^x > kx + b for x->inf

marsh citrusBOT
#

@upper gust Has your question been resolved?

upper gust
#

or in other words if every exponential function as x approaches infinity will surpass every increasing linear function

#

sry wasnt clear enough

#

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fringe prairie
#

The quadratic equation ax² + bx + a =0 with b>2a>0 has

(A) two equal roots;
(B) two roots that are opposite each other;
(C) two roots that are inverse to each other;
(D) two roots with opposite sign and different absolute value;
(E) no real roots.

still temple
#

So assume we have b = 5 and a = 2

#

This would give you 5 > 4 > 0 for the inequality

#

Now knowing that, can you substitute those values into the Discriminant of a quadratic and see what it would get you?

fringe prairie
#

i think i know the outcome now

still temple
#

right, this should tell u what the answer should be

fringe prairie
#

yeah its C

#

can u help me with another question if u want to?

still temple
#

I have a class right this second but good luck !

fringe prairie
#

alr ty for the help

#

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brazen oriole
#

Hi there i need some help with the following question: Given isosceles trapezoid.
Given that: the smallest base is 3 cm, the largest base is 9 cm, and
The stems are 5 cm

brazen oriole
#
  1. I need to find the hight of the isosceles trapezoid
#
  1. I need to find the space of it
#

I know that the angles of the biggest base are congruent

#

<@&286206848099549185>

#

<@&286206848099549185>

#

<@&286206848099549185>

#

<@&286206848099549185>

#

@tacit fjord

tacit fjord
#
  1. wtf are u pinging me for
brazen oriole
#

By Accident sorry

#

Sorry

#

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fluid river
#

I have:

M = {{0, {1}, 2}, {{1}, 2, 3}, {{1}, 2, {3, 4}}}
N = {{0,{1}},{{1},2,3},{1,{3,4}},{{1},2}}

What is ∪{M,N} and ∩{M,N}

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@fluid river Has your question been resolved?

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@fluid river Has your question been resolved?

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languid elm
#

Hi, I was wondering on how to solve this paticular part of this trignometry question

languid elm
#

I know that I have to convert from tan(-120) to cot

#

but how do i do so#

teal arch
#

Tan(-x)=-tan x

#

The use tan (90+theta) formula to convert to cot theta

#

Put in the value and voila

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unkempt osprey
#

does this work

marsh citrusBOT
unkempt osprey
#

I've found the slope -3/(2^9) at x = 16, but having difficulty finding tangent

high pine
#

slope is ok

#

now just use equation of the tangent line

#

y = m(x-x1) + y1

unkempt osprey
#

So far I have $$y = -3/(2^9) * (x - 16) + 1/8$$

high pine
#

correct, simplify and you're done

unkempt osprey
#

I get the wrong answer

proper zodiac
#

lost the minus on slope

high pine
#

aaaa, actually

elfin berryBOT
#

studying lang calculus

unkempt osprey
#

$$-\frac{3}{2^9}x + \frac{3}{2^5} + \frac{1}{2^3}$$

proper zodiac
#

16=2^4

unkempt osprey
#

oh lol

elfin berryBOT
#

studying lang calculus

unkempt osprey
#

That was the issue

#

thanks @high pine@proper zodiac

#

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still temple
marsh citrusBOT
still temple
#

is this right?

unkempt osprey
distant peak
unkempt osprey
still temple
still temple
unkempt osprey
#

If you draw y = x - 1 it might help

worthy trellis
still temple
#

yh i did but i put in those co ordinates n it said im wrong

#

am i ? vuz i think im right

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manic widget
#

the function: F(x) = the integral of f(x,t)dt, can someone give me an example where F(x) is non continuous

manic widget
#

but defined

crystal lintel
#

question feels a little unclear

#

but sorry i gtg anyway actually

manic widget
#

its parametric integrals

manic widget
tardy bluff
#

yo some one help me

#

some who know what thales euclid and pythagoras did

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#

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alpine chasm
#

Im so lost help please :)

marsh citrusBOT
leaden minnow
# alpine chasm Im so lost help please :)

so for part a, its just asking which image shows the locus of points (also known as the set of points) such that they are 6cm away from Q or less
do you have a guess for what the answer might be?

alpine chasm
#

b?

leaden minnow
#

yup

#

because anything outside of that green circle would be more than 6cm away from Q

alpine chasm
#

i see but i dont really get how the colours correlate

leaden minnow
#

the green is what the problem refers to as the shaded region
so the green is whatever satisfies the condition in the problem, which in this case was being less than 6cm away from point Q

#

that means that every point in that shaded green circle is less than 6cm away from Q

#

once you enter the non shaded region (in this case white), your condition is no longer satisfied

alpine chasm
#

right so would question b be a?

leaden minnow
#

this one asks for all points closer to P than Q
if A is the answer, then your claim is all the points in the green circle are closer to P than to Q, which is true
BUTTTT there are other points that satisfy the condition that lie outside of the green circle that are closer to P than to Q so answer A is not quite right

#

for example consider the right corner of A, the points in that area are closer to P than to Q, but they are not in the green shaded region

alpine chasm
#

im so lost im srry empensivecry

leaden minnow
#

its okie, its a bit hard to explain over text since this is so visual
let me see if i can show you it another way

alpine chasm
#

ok thank you

leaden minnow
#

okay, look at A where ive drawn a red point and a blue point

#

so for part b we want the locus of points that are closer to P than to Q

#

now the question is, does the red point satisfy that locus (aka is the red point closer to P than to Q)

alpine chasm
#

yes p is closer than q

leaden minnow
#

yes 🙂

#

now the next question is, does the blue point satisfy that locus (aka is the blue point closer to P than to Q)

alpine chasm
#

no its further from p than q

leaden minnow
#

good 🙂

#

okay now the question is, what region will have points where the points are closer to P than to Q?

#

so think about all the different red points i could draw where theyd be closer to P than to Q

#

(that will give you your answer because it will be one of the answer choices)

#

here ive drawn some more red and blue points to help you see it better

#

as you can see, all the red points are closer to P than to Q

#

while all the red points are NOT closer to P than to Q

#

so if i painted every possible red and blue point, which answer choice would that look like?

alpine chasm
#

im not too sure im still really confused empensivecry

#

i thought i understood then i got lost

leaden minnow
#

hmm, how about you try part c and then come back to part b

alpine chasm
#

would that be d? im just guessing.

leaden minnow
#

no not quite, because you have points in the green region that are NOT more than 6cm from P

#

for example, some points near P are less than 6cm from P

alpine chasm
#

ill just ask my teacher tmrw to help me with this i think its better in real life srry for wasting your time empensivecry

leaden minnow
#

its alright, hopefully youll understand it with your teacher

alpine chasm
#

ok ty

#

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minor yew
#

Not sure how to solve this, I’m assuming initial velocity isn’t 0 for this then?

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lofty shoal
marsh citrusBOT
lofty shoal
#

can someone please explain the question?

#

<@&286206848099549185>

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halcyon trail
marsh citrusBOT
halcyon trail
#

.close

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median rose
marsh citrusBOT
median rose
#

idk how to begin doing this

desert dirge
#

if theyre perpendicular then the gradients are negative reciprocals of eachother

#

so m1 = -1/m2

median rose
#

oh

#

i get it now thank you

#

.close

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agile tree
#

hi

marsh citrusBOT
agile tree
#

i need help

#

for this question

#

do i 6-12

#

or 6+12

#

because

#

i subtracted the y to make it one variable

#

then i did 4-2

#

2x

glacial hedge
#

That's not how signs work

agile tree
#

?

glacial hedge
#

You subtract -2x

agile tree
#

yes

glacial hedge
#

So it's actually adding 2x

agile tree
#

because i multiplied it by -1?

glacial hedge
#

Because - negative = + positive

agile tree
#

ok

glacial hedge
#

Yes

agile tree
#

so 9i would 6-12

#

right

glacial hedge
#

0 = 6x - 6 yes

marsh citrusBOT
#

@agile tree Has your question been resolved?

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still temple
#

Need help

marsh citrusBOT
still temple
#

Need some help with double integrals and polar coordinates, I think I have written in the right way but i don't get the correct result:

#

,rotate

elfin berryBOT
still temple
#

Should be 2 I think

#

.

marsh citrusBOT
#

@still temple Has your question been resolved?

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still temple
#

Anyone?

marsh citrusBOT
still temple
#

.reopen

#

Pretty sure this is simple and I'm not seeing what's wrong...

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north lily
#

hello, i want to solve the equation d(x,y) =< d(x,z) +d(z,y) could you help me please ?

north lily
#

i tried to appear what is d(x,z) + d(z,y) but i don't know how to expose it

marsh citrusBOT
#

@north lily Has your question been resolved?

north lily
#

<@&286206848099549185>

north lily
#

<@&286206848099549185>

marsh citrusBOT
#

@north lily Has your question been resolved?

marsh citrusBOT
#

@north lily Has your question been resolved?

north lily
#

.CLOSE

#

.close

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still temple
marsh citrusBOT
still temple
#

is correct?

mystic minnow
#

no

#

why'd you chnage back to x after integrating and then use the bounds for u?

still temple
#

int of 1 is x

#

or not?

mystic minnow
#

after you've substituted and changed the variables to u, the integral of 1 is u

still temple
#

integral of 1 is u?

#

how?

mystic minnow
#

your variable is u

#

so when you integrate 1, you get your variable, u

#

you're integrating with respect to u

still temple
#

you meaning this part?

mystic minnow
#

yes

still temple
#

i stil dont get it

mystic minnow
#

$\int 1\ du = u$\
$\int 1\ dx = x$ \
$\int 1\ dv = v$

elfin berryBOT
#

Zybikron

mystic minnow
#

+C

still temple
#

oh

#

you are right

mystic minnow
#

once you have changed all of your variables over to u, you are integrating with respect to u
so the integral of 1 is u

still temple
#

something like this

#

@mystic minnow

#

in this, i should take x as u or sen(2x)

#

or instead, do integration by parts

mystic minnow
# still temple

you still changed your bounds again. The 0,2 bound is on u, the 0,1 bound is on x

still temple
#

you mean this?

#

.close

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fading echo
marsh citrusBOT
fading echo
#

How do I figure out the 3 bigger solutions

#

Forgot how

high pine
#

basically it's sin(x) = 0.92
hence
x = arcsin(0.92) + 2πn or x = π - arcsin(0.92) + 2πn

#

manipulate with value of n to get next three solutions

#

and next solution won't be 2 btw

fading echo
#

Nani..

#

So can you show me how it isn't 2 @high pine

#

Still kinda confused

high pine
#

let n = 0
then:
x = arcsin(0.92) (solution provided in the sheet) or x = π - arcsin(0.92)

#

,w π - arcsin(0.92)

high pine
#

it's close to 2, but it's not 2

fading echo
#

Oh ok

#

Thanks

#

So to get the next bigger number what would I do?

high pine
#

let n = 1 and check

fading echo
#

Ok

#

Thanks

#

What about the next smaller solution

high pine
#

smaller that x = arcsin(0.92) ?

#

let n = -1 basically

fading echo
#

Oh ok lmao

#

Thanks

marsh citrusBOT
#

@fading echo Has your question been resolved?

marsh citrusBOT
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fresh oriole
marsh citrusBOT
fresh oriole
#

back at this cus it makes no sense6mwtfcrying

#

answer pleaseb_beg

spice verge
#

You have similar triangles

#

TVS and UVR

#

Use the ratio of side lengths that you know and call UV x

#

Or whatever variable you like

#

@fresh oriole does this help at all?

fresh oriole
spice verge
#

So basically due to having similar triangles their sides have a common ratio that changes the side length from one of the triangles to the other

fresh oriole
#

right yeah

#

so like 4 will go into 2?

spice verge
#

No

#

4 goes to 6

#

For the side you know

fresh oriole
#

OHH

#

OKAY i get it now

spice verge
#

Nice

fresh oriole
#

thank u thank uuu

#

.close

marsh citrusBOT
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still temple
#

confused

marsh citrusBOT
earnest kettle
#

what are you confused about?

still temple
#

when u do the substitution, r u changing the equation?

#

how do u use the oddness and evenness so to speak

#

i dont get the process, where do they change the limit from x to u

#

how do they go back to du to dx

#

dont u needa resubstitute

#

what's the point then

earnest kettle
#

the point is to cancel out both sides

#

in an odd function f(x) = - f(-x)

#

so the area cancel out

#

the area on the right cancels with area on the left side

#

this image is kinda bad

still temple
#

i get that it cancels out

#

but

#

couldnt u do this to any func and take it out this way

#

does subbing in u=-x change the expression itself

earnest kettle
#

it does not change

#

the integral is the same

#

but instead of being integrated by x, is integrated by u

still temple
#

how does it use the property of odd-ness

earnest kettle
#

what do you mean?

still temple
#

f(-x)=-f(x)

#

but at what point do they put a -

#

how does the substitution make use of the property

earnest kettle
#

see the second line

still temple
#

what am i supposed to see blood

earnest kettle
#

f(-u(x)) = -f(u(x))

still temple
#

i see

#

i get it now

#

thx

#

oops lol

#

can i ask another q

earnest kettle
#

sure

still temple
#

how do u decide the limits here

#

why is it -1 to -2 now

earnest kettle
#

lower limit: u(a) = 0
upper limit: u(b) = 3

high pine
#

look on the right

earnest kettle
#

then find a and b

still temple
#

nah look

#

at how it's +-1 and +-2

#
  • OR -
#

that's what's trippy to me

earnest kettle
#

a is either 1 or -1
and b is either 2 or -2

#

but sqrt(x² -1) says that x²-1 >= 0
x² >= 1
x>= 1 or x <= -1

still temple
#

where does the correspondence for b come from then

#

like

#

-1 and -2

#

not -1 and 2

earnest kettle
#

x cannot be between -1 and 1

#

so the integral from -1 to 2 cannot exist

still temple
#

oooh that's smort

#

thank u

marsh citrusBOT
#

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marsh citrusBOT
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fallen stump
#

calculator recomondstions?

marsh citrusBOT
lunar tree
#

?

fallen stump
#

i’m only in hs i’m taking calc next sem

lunar tree
# fallen stump i’m only in hs i’m taking calc next sem

I would look into finding a calculator that

  • can make a graph (so you can graph functions)

  • and has an ability to solve finite integrals (so that you can check your answers)

so that would be the TI-83 or TI-84

I would strongly recommend you to get a used calculator and then clean it up.

#

The best calculator from Texas Instruments is the TI-Nspire (there are multiple models with differing features)

I got a used one for a steal of $70 at a Pawn Shop. So I would look at local places to see if someone is selling a calculator

marsh citrusBOT
#

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marsh citrusBOT
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hexed rain
#

Hi, am converting a equation of the parabola into vertex form

hexed rain
#

Wondering if this looks correct so far

#

I have to relearn that factoring method which is why I didn't finish lol

raven bear
#

complete the square

#

you make the expression into a perfect square

#

of the form

#

a^2 + 2ab + b^2

hexed rain
#

is it correct so far though?

raven bear
#

so you can factor it into (a+b)^2

hexed rain
#

yeah, I just have to look up how to factor with that 2x^2

#

I'm used to just X^2

raven bear
#

you can divide by 2 as well

hexed rain
#

I can simplify that before factoring?

#

how does that rule work?

#

actually nvm

#

but good to know

#

here so far

#

am trying to find a number that works atm

#

I don't think there is one..

#

<@&286206848099549185>

#

.close

marsh citrusBOT
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stone merlin
marsh citrusBOT
stone merlin
#

how 😦

trim quest
#

What did you do for the first one?

stone merlin
trim quest
#

Critical numbers are values of t that make h'(t)=0

#

So, take the derivative, then find where it's equal to 0

stone merlin
#

gachu

#

i dont know how to factor it

#

once i get to the first derivative @trim quest

trim quest
#

What'd you get for the derivative?

stone merlin
trim quest
#

Maybe it would help if we made a substitution?

#

like a = t^-1/4

#

if we let $a=t^{-\frac{1}{4}}$, then we have $\frac{3}{4}a-\frac{3}{2}a^3 = 0$

elfin berryBOT
#

tatpoj

stone merlin
#

im stuck now

#

so basically

#

3/4(3/4+3/2)?

trim quest
#

Hang on, let's try something else

trim quest
#

$\frac{3}{4}t^{-\frac{1}{4}} - \frac{3}{2}t^{-\frac{3}{4}}=0$

elfin berryBOT
#

tatpoj

trim quest
#

This is what you want to solve

#

You can get rid of the negative exponents by multiplying both sides by t^(3/4)

stone merlin
#

uh

#

ok

#

so

#

3/4t-3/2t=0

#

ye?

marsh citrusBOT
#

@stone merlin Has your question been resolved?

marsh citrusBOT
#

@stone merlin Has your question been resolved?

marsh citrusBOT
#
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frail zenith
marsh citrusBOT
frail zenith
#

would this be the same as e^1 = (x+3/2x+1)

mystic minnow
#

yes

frail zenith
#

thanks

#

.close

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thorn sparrow
#

Lately I have been interested in converting coding problems into mathematical functions, and this is one of them :
You start with X adult cows and 0 baby cows. Once per minute, for every pair of adult cows, one baby cow will be bred. A baby cow takes 2 minutes to become an adult. So with X starting adult cows, how many of them will there be in Y minutes.
With Z being the final number of adult cows, your equation should only be expressed using X, Y and Z as variables. With f(X, Y) = Z

thorn sparrow
#

the code is

#

The first thing I taught of is using series

#

and i'm stuck on that right now

marsh citrusBOT
#

@thorn sparrow Has your question been resolved?

marsh citrusBOT
#

@thorn sparrow Has your question been resolved?

young owl
#

Idk if append is what you want here
I would do something like that:
babycow is a vector [a, b] where a is the number of baby cow born the minute before and b the number of babycow born this minute
then at each minute, adultcows += babycow[0]
babycow[0] = babycow[1]
babycow[1] = int(adultcows/2)

deft apex
#

Im getting a logic error of 5 total adults by the end when I think it should be 4

thorn sparrow
#

guys give me a minute to read before I respond I usually do this in french

deft apex
#

ja habite eccosse

thorn sparrow
#

hahaha

deft apex
#

did that work

thorn sparrow
#

bien essaye

young owl
#

j'ai vécu en France

thorn sparrow
#

you were close

#

you would have to say :

deft apex
#

ohhh merdeeee

thorn sparrow
#

j'habie en écosse

deft apex
#

jai adore le fromage

thorn sparrow
#

that works

#

it mean i liked the cheese

#

tho it's written like this: j'ai adoré le fromage

#

ok let me read the reply

thorn sparrow
deft apex
#

wait

#

I might have it

#

omg

#

this works for my specific set case

#

not tried it with any other numbers

#
def cowCalc(x,y) :
  minutes = x 
  adult_cows = y
  newbabies = [[] , []]


  for minute in range(minutes) :
    newbabies[0].append(adult_cows//2)
    newbabies[1].append(minute)
    print(newbabies[0])
    print(newbabies[1])

    for x in range(len(newbabies[0])) :
        if len(newbabies[0]) > 2 :
            if newbabies[1][x] == newbabies[1][minute-2] :
                newbabies[0][minute] -= newbabies[1][x]
                adult_cows += newbabies[0][minute-2]
                
        else : 
            pass

  return adult_cows
    
print(cowCalc(4,2))
#

it returns 4 adults

#

which is what my flow chart got

thorn sparrow
#

you're kinda losing me with your code tho lets start with the problem you mentioned

thorn sparrow
#

i have no errors running my code

deft apex
#

noo I was coding mine from scratch

#

I was speaking about mine, don't think I was tracking the values correctly

#

uses a 2D array to track the amount of new babies and the minute they were born at

thorn sparrow
#

ahh ok so your keeping track of the results If i understand

deft apex
#

oui

thorn sparrow
#

ok well this is what i get

deft apex
#

if we track the minute they are born at we can compare it

#

if newbabies[1][x] == newbabies[1][minute-2] :

#

this is the age checker

#

x is looping through the entire array of values

#

and seeing if its 2 minutes old yet

#

and if it is it adds it and removes it from the total of babies

thorn sparrow
#

i get this

deft apex
#

what are the params?

thorn sparrow
#

calling this minecraftCowConundrum(2, 15)

deft apex
#

ok

#

so 15 minutes as 2 starting cows

#

can you try 2 starting cows and 4 minutes

#

to see what you get

#

ah ok

#

I have logic error in my code still

thorn sparrow
#

it'll be the same list but shorter

deft apex
#

oh I see what you're doing

thorn sparrow
#

2 starting cows and 4 minutes

#

the baby array is on top

deft apex
#

yep

#

nice

thorn sparrow
#

and the adult one is on the bottom

deft apex
#

you should do a flow chart of like 2 adults and 5 minutes and see if it matches your code

thorn sparrow
#

i'm trying to find a relation to convert this into a math equation

deft apex
#

emm

#

hmm

thorn sparrow
#

I thought about using series

deft apex
#

I would start with a table of values

thorn sparrow
#

but the thing is i'm using 2 right now if you think about it

#

my end goal once I find the solution to this is to be able to apply it to eaven bigger functions

deft apex
#

ok im getting somewhere

thorn sparrow
#

Really!?