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proven robin
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and replacing it with the integrals

mellow grail
#

yeah

proven robin
#

but that doesnt seem to work

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i dont know

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do you know how?

mellow grail
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Well i am thinking

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wait if you write it as a product of 3 terms

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(-1)^n * integral 1 * integral 2

proven robin
#

yes

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and a sum of this product

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now what?

mellow grail
#

uhh

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1 = 1/n * n right?

proven robin
#

yeah

mellow grail
#

so if u let x = 1/n, y = n in third identity

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u have a double integral

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double integral * third identity

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bruh that doesnt work

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since 1 is not < 1

proven robin
#

hmmm

mellow grail
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xy = 1 in our case

proven robin
#

<@&286206848099549185>

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there's an answer here but it is limited for subscribed users

alpine sable
#

'member slader?

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yeah i 'member slader

proven robin
#

?

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wdym

mellow grail
#

i think this converges to phi

proven robin
#

no

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log means ln

mellow grail
#

bruh i used another calculator it recognised my input wrong

mellow grail
proven robin
#

which calc?

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wolfram?

proven robin
mellow grail
#

no

proven robin
#

well

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do you have any idea?

mellow grail
proven robin
#

do you know anyone who can help?

mellow grail
proven robin
#

can i mention them?

mellow grail
#

I think so

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Fun fact, u can write the double integral as double integral of another sum divided by (-1)^n * x

proven robin
#

@vale wigeon

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could you please help us?

vale wigeon
#

augh i literally got pinged thrice in three different channels

proven robin
#

sorry

mellow grail
#

$$\sum_{n=1}^{∞} \int_{0}^{1} \int_{0}^{1} \frac { \frac{-xy}{1+xy}}{(-1)^n*x} dxdy$$

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Brruh why did everything go to hell

proven robin
#

that's kinda strange isnt it

mellow grail
#

Yeah but its smthing ig

proven robin
#

the sum in the nominator is with respect to n

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but theres no n there

mellow grail
#

Oh shi-

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that wasnt supposed to be there

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it should've simply been this

ocean sealBOT
#

ItzKraken2

lone heartBOT
#

@proven robin Has your question been resolved?

lone heartBOT
#

@proven robin Has your question been resolved?

lone heartBOT
#
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near rose
#

Hi, What is the value of (a-b)/(a+b) when 9^a=2^(1/b), (a+b)^2=6*log2/log3 for both positive numbers a,b?

lone heartBOT
#

@near rose Has your question been resolved?

wet nest
#

ablog9=log2
ab= log2/log9= log2/2log3
a^2-b^2 = (a+b)^2-4ab = 6log2/log3 - 2log2/log3= 4log2/log3
(a-b)/(a+b)= a^2-b^2/(a+b)^2= 4(log2/log3) / (6 log2/log3)=2/3

lone heartBOT
#

@near rose Has your question been resolved?

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alpine sable
lone heartBOT
alpine sable
glacial rover
#

The question isn’t phrased great but I’m assuming that the % of willing does not include those who are also willing to pay all and most of the fee

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I’m guessing it would say at least half for it to include the other data points

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I mean it’s clearly not B or D

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I’m leaning towards C as it makes sense it just isn’t exactly correct

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But it still could be A, it seems to depend on the extremity of exclusion for mistakes in the statement

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As I would argue you can infer that it is correct but it should be induction not certainty

lone heartBOT
#

@alpine sable Has your question been resolved?

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alpine sable
#

it helps when people help me

lone heartBOT
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glossy hill
#

Hi, is that true ?

lone heartBOT
lunar fog
vale wigeon
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@glossy hill yes

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it's just a^2 b^2 = (ab)^2

lunar fog
#

?

glossy hill
limpid spade
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a²+b²=a²b² looks right to you?

glossy hill
#

i think no

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ok thanks you !

#

.close

lone heartBOT
#
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floral knoll
#

Hi, im currently trying to understand the equation for radioactive decay and activity and i came across the word "decay constant". its calculated like that: λ = ln(2) / T1/2. But does someone know, why I have to calculate it with the ln(2)

tacit arch
#

You want the math derivation?

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Or you want to know something else?

floral knoll
stark yew
#

Do you know integration, @floral knoll?

floral knoll
stark yew
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But here's an overview anyway:

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Suppose N is the size of a population of radioactive atoms at a given time t, and dN is the amount by which the population decreases in time dt; then the rate of change is given by the equation dN/dt = −λN, where λ is the decay constant. Integration of this equation yields N = N_0 e^(−λt), where N_0 is the size of an initial population of radioactive atoms at time t = 0.

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The half-life, is then given by N(t_half) = N_0/2

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Solving this for lambda yields $\lambda = \frac{\ln 2}{t_{\frac12}}$

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Suppose $N$ is the size of a population of radioactive atoms at a given time $t$, and $dN$ is the amount by which the population decreases in time $dt$; then the rate of change is given by the equation $\frac{dN}{dt} = −\lambda N$, where $\lambda$ is the decay constant. Integration of this equation yields $N = N_0 e^{-\lambda t}$, where $N_0$ is the size of an initial population of radioactive atoms at time t = 0. The half-life, is then given by $N(t_\frac12) = \frac{N_0}2$. Solving this for lambda yields $\lambda = \frac{\ln 2}{t_{\frac12}}$

floral knoll
#

thank you, ill screenshot it and try to understand

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thank you very much

#

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lone heartBOT
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tepid knot
lone heartBOT
tepid knot
#

im confused

ocean sealBOT
tepid knot
#

can someone tell me how to do this problem

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end of year trig killin me

tacit arch
ocean sealBOT
#

riemann

tacit arch
#

Second row

tepid knot
#

thx

proven leaf
# tepid knot

you can also figure that sin(x) shifted pi/2 units to the left looks like another curve as well :))

tepid knot
#

im just forgetting sum diff rules

wet nest
#

Cos(90+x)=-sinx

lone heartBOT
#

@tepid knot Has your question been resolved?

lone heartBOT
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late moss
#

hello

lone heartBOT
late moss
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can i ask a physics related doubt here?

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related to relative motion>

gilded magnet
#

Ok

late moss
#

this is the ques

gilded magnet
late moss
#

if we do it wrt truck

gilded magnet
late moss
#

then why do we take velocity towards west and 10-vsin theta
and now towards east. vsintheta-10
lets say we need to study relative motion of b wrt a
then we just take inverse of velo or acclrn of a and add it to b right?
then why didnt we do vsintheta-10 here

late moss
#

lol

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how did u recognize

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he is such an awesome teacher.. well better than my teacher at fiitjee atleast

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but i couldnt understand this concept

gilded magnet
late moss
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can u explain why he took 10-vsin theta

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instead of vsin theta - 10

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??

queen cove
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He's measuring relative to the truck

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Not to the start position of the boy

late moss
#

yes

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ik

queen cove
#

And so the boy would be getting closer, not further

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so the negative

late moss
#

why closer

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:/

queen cove
#

Its assuming the truck is moving faster than the boy

late moss
#

he said that to judge a motion of lets say a wrt to b we will take velocity or accln of a and inverse it and add it to velo or acclrn of b

queen cove
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If the boy was moving faster the 10-Vsin theta would be negatie

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and so further away

late moss
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i still cant understand :(

queen cove
#

both are equally correct, just take into account the negative at the end

late moss
#

which -ve?????

queen cove
#

If you use 10 - Vsin theta, if the boy was getting closer to the truck 10 - Vsin theta would be negative
If you use Vsin theta - 10, if the boy was getting closer to the truck Vsin theta - 10 would be positive

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They're both valid, just check whether the end sign makes sense

late moss
gilded magnet
#

If vsintheta were greater than 10 then he wud definitely cross?...

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Since he's moving rightwards at greater speed

queen cove
#

Yes

gilded magnet
#

So it's obviously the other case

queen cove
#

Yes

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but you can use either in your equations

gilded magnet
late moss
#

to cross?

gilded magnet
late moss
#

:(

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ha rest mei krwaya to

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truck ko

gilded magnet
late moss
#

krdiya

gilded magnet
#

Idk bruh i learnt relative 2 yrs ago

late moss
#

to fir vsin theta + 10m/s west hoga na

gilded magnet
#

Mum burnt Mohit sirs notes

late moss
#

u prepared for jee too

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?

late moss
gilded magnet
late moss
#

yes

gilded magnet
late moss
#

yup

gilded magnet
#

If vsintheta is greater

late moss
#

yes

gilded magnet
#

Then it's quite straightforward

late moss
#

yup

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bhai ek baar kya voice call pe aa skte ho? mai kaafi der se ye question soche jaa rha.. it would be easier for me to explain my doubt @gilded magnet

queen cove
#

You can (with reference to the start point of the boy) figure out his end point. If the truck passes that endpoint before he reached it, he did not cross.

gilded magnet
late moss
#

so u mean to say i can solve with vsin theta - 10 too?

gilded magnet
#

The question says 'just crosses the road'

gilded magnet
gilded magnet
#

Like 0.01 sec late

gilded magnet
gilded magnet
late moss
#

yes

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so its good isnt it?

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thats what we want

gilded magnet
#

He wud always be at a distance from the truck while having just crossed

late moss
gilded magnet
late moss
#

yup

gilded magnet
#

'JUST CROSSES'≠'CROSSES'

late moss
#

ahhhh

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btwww

#

is vsin theta east - 10 m/s east= 10m/s west - v sin theta west

gilded magnet
# late moss ahhhh

Btw join the physics server.waha pe petschge hai.petschge Amit sir ka baap hai.

late moss
#

?/?

late moss
#

lol

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i thought vo foreign ka hai

gilded magnet
late moss
#

o

gilded magnet
#

Max planks pe bhi tha

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Solar winds vagera karte te

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1 sec

late moss
#

kk

late moss
gilded magnet
late moss
#

but if they are equal then vsin theta -10 se bhi krne ka kuch to way hoga

gilded magnet
#

During motion

late moss
#

yup

#

acha

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truck rest pe hhai

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isiliye??

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cos vsin theta -10 lene se hum aur dur jayege

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and just cross nhu krege

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?

gilded magnet
late moss
#

solve

gilded magnet
#

Haan

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I'm dumb

late moss
#

nhi

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i m in 11th

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u have much more exp

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just started my 11th journey

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btw is abj sir enough for jee

gilded magnet
#

Bruh i messed up everything

late moss
#

whyy

gilded magnet
#

I'm not explaining here

late moss
#

dm

#

?

gilded magnet
late moss
#

okkk

gilded magnet
late moss
#

kk

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thnx alottt

gilded magnet
late moss
#

dont wanna wastw all the efforts ff

gilded magnet
#

Yea ryt but if u feel like ur trapped or ever feel mentally low...u need reminders

late moss
gilded magnet
#

Cool

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Like my dp then

late moss
#

but chem is such a disgusting subject

late moss
gilded magnet
late moss
#

too much rote learning

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and phy ke abhi udhar teacher ache nhi hai

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so abj sir se pdh rha

gilded magnet
#

Yea btw u hearda aanand srinivas stayqrious?

late moss
#

yes

gilded magnet
#

Floatheadphysics?

late moss
#

yup

late moss
gilded magnet
#

Edupoint?

late moss
#

nope

gilded magnet
late moss
#

ahhhh

gilded magnet
#

Starting from motion in straight line

late moss
#

OH damn why tho?

gilded magnet
#

Reached projectile

late moss
gilded magnet
#

Academic pressure didn't let me learn stuff from first principles

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Now physics is not part of academics as I'm taking btech cse

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12th just over

late moss
#

hey btw i have another doubt... when there is no wind and car is moving forward.. then the flag flutters in opposite direcn..but when there is wind and car is moving forward.. we take the velocity of flag same as the velo of car and ins ame direcn

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why is that so

late moss
gilded magnet
#

Bro igtg

late moss
#

kkk

gilded magnet
#

Mom asking to sleep

late moss
#

okk cyaaaa

gilded magnet
#

Bye broski all the best

late moss
#

thnx

#

.close

lone heartBOT
#
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pallid creek
lone heartBOT
pallid creek
#

The downfall of proof by algebra? 👀

tacit arch
pallid creek
#

Why is it not working

#

4^1 is not -4

north canopy
#

then x isnt 1

pseudo ice
pallid creek
#

Yes

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What did I do wrong

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I feel like I have made a dumb error and it's staring right at me

pseudo ice
pallid creek
#

I don't see it

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Square both sides

pseudo ice
#

That introduces extra solutions when you do so

pallid creek
#

What?

pseudo ice
#

e.g. take x = -1, squaring both sides would get you that x^2 = 1, and solving that gets you that x = ±1 (a more silly example)

north canopy
#

yep

pseudo ice
#

This here already has no solutions (for real choices of x, 4^x is always strictly positive)

pallid creek
#

Oh I know

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I just wanted to see what would drop out

north canopy
#

,w 4^x=-4

pallid creek
#

Doesn't that mean

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This also has 2 solutions??

north canopy
#

u can rewrite 2 as sqrt4

pallid creek
# ocean seal

Knew it had i, thought it would come out from the algebra

north canopy
#

¯_(ツ)_/¯

pallid creek
north canopy
#

yea but 4^x can be 2

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4^x cant be -4

pseudo ice
#

You squared something that was negative in the first one, which created the solution that didn't exist

pallid creek
#

But -4² is always 16

north canopy
#

yea but u forced it

pallid creek
north canopy
#

u made new solutions

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if the base thing is fundamentally wrong, u wont rly go anywhere

pallid creek
#

But that is how people found out what 4^½ was no? They could've believed that 4^1 = -4 and 4 bc that's what the algebra says

north canopy
#

its wrong tho

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like 4^x will always be positive

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ur forcin ur solution to be a thing, while it isnt correct

pallid creek
#

Then what?

north canopy
#

plug back in and u see it isnt possible

pallid creek
#

It shows clearly and arithmetically that 4^1 can equal -4. I know this is wrong but I want to know why, and not bc I'm forcing it bc maths doesn't just do that from what I've seen

#

If I am "forcing it", then all proof is unreliable, bc I haven't forced anything. I have just done algebra

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Gonna go out for a bit, I'll read it if it closes automatically or smth

lone heartBOT
#

@pallid creek Has your question been resolved?

lone heartBOT
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little ledge
#

someone ples explain the theorems

lone heartBOT
little ledge
#

bro

#

u need to open ur own channel

quiet vector
#

!help

lone heartBOT
royal plank
little ledge
#

all four

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i mean nvm 3. a

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evyerhing except 3 a

quiet vector
#

for 3 b

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u know the inscribed angle relation with central angle right?

little ledge
#

no i wasnt paying attention

quiet vector
#

finish this vid and come back

little ledge
#

ok

quiet vector
#

@little ledge

#

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-inscribed-angles/v/inscribed-and-central-angles

Proving that an inscribed angle is half of a central angle that subtends the same arc. Created by Sal Khan.

Watch the next lesson: https://w...

▶ Play video
#

this might be better

#

the last one probly doest have a proof

little ledge
#

i get it

quiet vector
#

ok so look into 3 b then

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break the required angle into arcs that u know abt

little ledge
#

whatt is teh intersection meant to be the center

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there is no center

quiet vector
#

the intersection isnt the center

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imagine or draw a center O

little ledge
#

ok

quiet vector
#

the required angle can be broken down to these arcs; this should be enough help for u to figure out the answer

little ledge
#

ohh i see it now

#

thank u

#

.close

lone heartBOT
#
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indigo harbor
lone heartBOT
indigo harbor
#

I was asked to differentiate that function

#

How to find the value of F'(x)

placid zinc
#

I'll call the inside function g(t), and say its anti-derivative is G(t). Then:

F(x) = G(inf) - G(x)

quiet vector
#

if u ignore the bounds...

placid zinc
#

What's the derivative of that equation?

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(Where inf is really a lazily applied limit)

indigo harbor
placid zinc
#

Sorry I am back

#

If I take the derivative of both sides, I get:
F'(x) = -g(x)

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= -e^(-x)/x

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This is a useful method for taking the derivative of any integral with the variable in the bound

lone heartBOT
#

@indigo harbor Has your question been resolved?

indigo harbor
#

Thank you so much

lone heartBOT
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amber tulip
#

need help with 2.1.1

lone heartBOT
alpine sable
#

And successively take those

amber tulip
#

what

alpine sable
#

eg. $4^{\frac{2}{3}} = (4^2)^{\frac{1}{3}} = 16^{\frac{1}{3}}$

trail remnant
#

4th root of 81 cubed
sqrt of 81 twice is 3
3 cubed is 27

fractional powers mean roots, where the denominator is the root

the coefficient is then the integer power, in this case 3.

ocean sealBOT
#

seymourdavison22

proven leaf
#

start with this property $\frac{1}{m^{n}}=m^{-n}$

ocean sealBOT
#

XxMrFancyu2xX

proven leaf
#

see if you can figure out the rest from there :))

amber tulip
#

so 1 over the thing = the thing negatively?

#

then I just do it normally cos it's positive now?

proven leaf
#

just simplify $81^{\frac{3}{4}}$ like you do normally and keep it in the denominator:))

ocean sealBOT
#

XxMrFancyu2xX

amber tulip
#

thank youuu

proven leaf
#

use $(a^n)^{m}=a^{n\cdot m}$

ocean sealBOT
#

XxMrFancyu2xX

lone heartBOT
#

@amber tulip Has your question been resolved?

alpine sable
#

@mathelpers

lone heartBOT
#

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wheat isle
#

Is this how you would do a question like this

wheat isle
queen cove
#

If it's an evaluate then yes the process is correct, but you forget to make it -1 + h

wheat isle
#

Oh shoot

#

Alright

#

Thanks

queen cove
#

All good?

wheat isle
#

I’m a little confused for this one as well

#

Should I be using m= (y2-y1)/(x2-x1)

queen cove
#

For which part

wheat isle
#

Part a and b

placid zinc
queen cove
#

Yes it seems so

placid zinc
#

That's the slope of a secant always.

wheat isle
#

Okay

#

So I know my x1 and y1 will be (1,2)

#

To find my y do I sub in 1.01?

placid zinc
#

x = 1.01, into the equation y = x⁴ + 1? Yeah

wheat isle
#

So we get

#

=
2.040604

#

Is that our y2 and y1 is x2=1.02

placid zinc
#

y1 is x2 = 1.02?

placid zinc
wheat isle
#

Oops

#

I meant to say

#

x2 = 1.01

queen cove
#

For a go through (1.01, y1)
For b go through (0.99, y2)
For c find the mean of these values and use that for x = 1

wheat isle
#

So is x2 going to be 1.01

queen cove
#

Sure

wheat isle
#

Is that correct for part A

#

m=4

queen cove
#

I think so

placid zinc
#

Why is that exact

queen cove
#

Cus the examiners are nice

placid zinc
#

That's really nice

wheat isle
#

No way

wheat isle
wheat isle
queen cove
#

I think actually get the gradient of the line though x1 and y1

wheat isle
#

How?

lone heartBOT
#

@wheat isle Has your question been resolved?

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heady plank
#
  1. How should i find expression for the apparent nth term a_n of the sequence?
    3,10,29,66,127....

  2. Why following expression is wrong for following sequence?
    1,-1,1,-1,1...

My Answer: a_n = -(-1)^n
Actual Answer: a_n = (-1)^n+1

queen cove
#

Those answers are equivalent

heady plank
#

i know, but latter seems to be "preferred" by professor and book

#

not sure why

wanton valley
#

Essentially its the same as 2*(2)^n

#

Makes no sense to write it that way

heady plank
#

ouch

wanton valley
#

So more compact would be 2^(n+1)

#

You get what i mean?

heady plank
#

honestly no, sorry ;P would be great if you can elaborate some more.

wanton valley
#

In mathemathics we want to write terms in a series as compact as possible

#

So instead of 2*(2^n)->2^(n+1)

#

Likewise (-1)*(-1)^n=(-1)^(n+1)

queen cove
#

When multiplying two exponentials you add the powers, so $-(-1)^n = (-1) \times (-1)^n =(-1)^1 \times (-1)^n = (-1)^{n+1}$

ocean sealBOT
#

WeAreIngram

heady plank
#

oh god, you are right. can't belive i forgot that rule

#

thanks, now i understand that.

queen cove
#

Great

heady plank
#

.close

lone heartBOT
#
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bronze cloak
#

i need help

lone heartBOT
queen cove
#

For (2)

bronze cloak
queen cove
#

If the equation has two repeated roots then the discriminant (b^2 - 4ac) is equal to 0

#

So write out the full discriminant and set it equal to 0

queen cove
#

np

bronze cloak
queen cove
#

Solve that new equation

bronze cloak
#

idk how to solve when there is a

#

power

#

nvm i got it

#

thx

queen cove
#

np

bronze cloak
queen cove
#

You also have to consider 2x - 4 = -17

bronze cloak
queen cove
#

Your value is correct

#

Another value is x = -6.5

#

So the sum of all solutions is 4

bronze cloak
#

thx

solid sonnet
#

You can also square both sides and solve

queen cove
#

Yep

#

Although doing that all the time may lose solutions

bronze cloak
#

i just calculated both and got 4

queen cove
#

Yay

bronze cloak
#

as sum of both

solid sonnet
#

Nice

bronze cloak
#

and for number 2 i got -2

#

is that correct

queen cove
#

Yep

bronze cloak
#

thx

#

can u help with q3 if possible

queen cove
#

It would take too long to type out on my phone

#

Basically you use their hint to simplify it to a quadratic over a quadratic = 73/3

#

Then you expand out those quadratics and multiply up both sides to get to quadratics equal to one another's which you can then combine into one quadratic and then solve

queen cove
#

Ask someone who's on pc it would take me a week to type on my phone

lone heartBOT
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chrome depot
#

For what values of k will the following equation always be negative?

chrome depot
#

The equation is always negative when D < 0

tacit arch
#

What's D

chrome depot
#

Determinant

#

Is it called that way in english

#

That thing under the square root in quadratic formula

#

Where D = b^2 - 4ac, or in this case ->
D = (-2k^2)^2 - 4k(k^3 + k^2 - 3k - 4) = 4k^4 - 4k^4 - 4k^3 + 12k^2 - 16k = -4k^3 + 12k^2 + 16k

#

So, D = -4k^3 + 12k^2 + 16k

tacit arch
chrome depot
#

Then, we follow that D < 0:

-4k^3 + 12k^2 + 16k < 0
divide everything by k
-4k^2 + 12k + 16 < 0
divide everything by 4
-k^2 + 3k + 4 < 0
Solve the equation: -k^3 + 3k + 4k = 0 (roots are 4 and -1)

chrome depot
chrome depot
#

And that should be the solution

#

But it isn't

#

According to the book

tacit arch
chrome depot
#

But here is the image if you want

#

@tacit arch (in case you are waiting for the ping)

#

Another observation: k must be negative and D < 0, for this to be always negative

tacit arch
#

,rotate

ocean sealBOT
chrome depot
#

I have translated the problem up there, there's nothing more to it

tacit arch
chrome depot
#

I don't know

#

That's a good observation

#

So that's an illegal move?

#

Wait wait wait

#

Let me try and solve now!

tacit arch
#

you just have to treat k>0 and k<0 separately

chrome depot
#

Yes!

chrome depot
#

In fact

#

Only k < 0

#

Because that's what exercise wants

#

Like, k = a in this problem, and when D < 0 and a < 0

#

Then the function is completely negative

#

Solution found!

#

Thank you very much @tacit arch !

lone heartBOT
#

@chrome depot Has your question been resolved?

lone heartBOT
#
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brazen berry
#

Linear Algebra PQ ive been stuck on

lone heartBOT
brazen berry
#

does it have something to do with the e_1, e_2, and e_3 vectors?

#

1
0 = au + bv + cw
0

#

looking through my notes i cant really find much related to this

#

or should i put the 4x1 vectors in a system and reduce to ref or rref?

brazen berry
naive valley
#

if you stack the three equations together columnwise, you get something of the form TA = B, which you can solve as T = BA^-1

brazen berry
#

I'm not sure i understand that, sorry

#

any way you can simplify or reword the explanation?

#
 3 0 2
 3 0 0
 3 2 2
-1 4 2
```?
#

like that?

naive valley
#

that's B

river blaze
#

You just multiply botch sides with the inverse of A

naive valley
#

A is ```
0 1 -3
-3 -4 4
-2 -2 1

#

your three equations together are the same as TA = B

brazen berry
#

oh okay, thats making a bit more sense to me

#

how do i find the inverse of A again?

naive valley
#

you can start with the augmented matrix [A | I] and row reduce it until you get [I | A^-1]

brazen berry
#

okay, i think that makes sense!

#

ty both!

#

.close

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#
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silver portal
#

I need help

lone heartBOT
shy dove
#

@silver portal when they don't do it for you, labeling sides usually helps.

#

And putting a variable for the sides you don't know

silver portal
#

So a b c and h

shy dove
#

yeah I suppose. I'll draw some things and send the picture in a second

#

let's take this for example

#

can you tell me what side CD is?

silver portal
#

21?

shy dove
#

21 is the whole thing

silver portal
#

10.5

shy dove
#

you don't know if it's split halfway

#

hint: it's not a number alone, it contains another side

silver portal
#

thats the only side cd can be aint it

shy dove
#

i'm not sure I get you. But does this make sense to you?
CD = 21 - AD

silver portal
#

Ye

#

Why - ad

#

I never done this before so i dk

shy dove
#

because the side on the right = whole thing - side on the left

#

(on the right and left of the dotted line that is)

#

another way to see it is:

whole thing = left + right
(do - left on both sides)
whole thing - left = right
#

does this make more sense?

silver portal
#

Ye

#

whole thing is 21 tho

#

left isnt given

shy dove
#

yeah that's the thing, you have to work around that, but I'm getting there

#

using CD you just found (21-AD), BD, and BC, can you think of a way to solve for AD?

silver portal
#

Bc - bd

shy dove
#

I mistyped it sorry 😅

#

I meant the two sides with known lenghts plus the one with 21-AD

silver portal
#

So 8 and 17

shy dove
#

yes

#

essentially that bigger triangle on the right

#

a right triangle might I add, might help you see it

silver portal
#

Weird question but u know what an isoceles triangle is

shy dove
#

two sides have same measures

silver portal
#

If those 2 triangles were split the left would be isoceles and the right would be a right triangle

#

If i solve those like that would i still get the right answer

shy dove
#

I'm not sure. Honestly I'm seeing one way, but there probably are more. Here I'll send what I mean, maybe I'm just not clear

#

with the three sides I drew, you can find AD. and with AD, the question mark side

#

bleh, I need to leave, very sorry about that, but if you use pythagora's theorem with what I've shown you will be able to do it. I believe in you :)

lone heartBOT
#

@silver portal Has your question been resolved?

silver portal
#

<@&286206848099549185>

lone heartBOT
#
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wheat isle
#

With questions like these

lone heartBOT
wheat isle
#

Where it requires a phase shift

#

Would this be considered correct or incorrect

#

Do I have to complete the curve that appears before pi/2 or no

#

Because it starts at pi/2

vale wigeon
#

sinusoids do not have any inherent start point

#

you, however, are asked to graph yours over the interval [0, 2pi]

#

and right now, you are missing the part from 0 to pi/2

#

so yes you have to complete that too

wheat isle
#

Oh wait

#

It should be going down to -3

vale wigeon
#

sure should...

wheat isle
#

also I need help with solving tan2(theta)=1

#

I have a lot of trouble with solving equations over a restriction

#

so I have tan^-1(1)= 45 degrees for base angle

#

And tan is pos in Q1,Q3

#

But the restrictions say [-180,180]

#

@vale wigeon does this mean Q3 won’t be part of the solution?

vale wigeon
#

i think it's not very helpful to think of quadrants here simply because your equation is tan(2x) = 1

#

you are best off writing down the general solution, i.e. in degrees, 2x = 45 + 180n

#

wait, did you mean tan(2θ)=1 or tan^2(θ)=1?

#

tan2(theta) feels like deliberate ambiguity

#

@wheat isle?

wheat isle
vale wigeon
#

ok

#

well you should NEVER write as tan2(theta)

#

anyway

wheat isle
#

What I thought was I can use quadrants and then divide the angles by 2 afterwards

vale wigeon
#

yeah, that approach makes the domain restriction tricky to account for.

wheat isle
#

But quadrant 3 and the restriction -180,180 confuses me

#

yep

vale wigeon
#

that's why i am suggesting a different approach that makes the domain restriction straightforward to deal with.

#

first solve the equation over all real numbers
then filter out only those solutions that belong to your desired interval

wheat isle
#

How do I solve tan(2)theta = 1

#

I don’t think there’s anything to simplify

vale wigeon
#

this is deliberate and malicious on your part...

#

there's no other explanation for why you keep putting parentheses in exactly the wrong places

wheat isle
#

tan(2theta)

vale wigeon
#

from tan(2theta) = 1, go to 2theta = arctan(1) + 180n

#

where n ranges over the integers of course

wheat isle
#

45+180n?

vale wigeon
#

yes

lone heartBOT
#

@wheat isle Has your question been resolved?

#
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celest stump
lone heartBOT
celest stump
#

how do i do this?

lone heartBOT
#

@celest stump Has your question been resolved?

celest stump
#

<@&286206848099549185>

weary widget
#

Well...

#

first, find the intersection point of $y = 3x+2$ and $y=5x+3$.

ocean sealBOT
#

1048576Prog

celest stump
#

3x+2=5x+3
-2x+2=3
-2x=1
x=1/-2

#

oops

weary widget
#

OK that's ok

celest stump
#

i know you break it down to parametric equations(i think) but idk how to deal with the 3 variables

weary widget
#

expand $(0,-1,-2)+k(1,2,3)$

ocean sealBOT
#

1048576Prog

weary widget
#

like $(0,-1,-2)+k(1,2,3)=(\cdot,\cdot,\cdot)$

ocean sealBOT
#

1048576Prog

celest stump
#

oh

#

(0+k,-1+2k,-2+3k)

weary widget
#

simillarly expand $(1,2,0)+m(-1,1,0)+n(0,1,-1)$

ocean sealBOT
#

1048576Prog

celest stump
#

(1-m,2+m+n,-n)

weary widget
#

So, (0+k,-1+2k,-2+3k) = (1-m,2+m+n,-n)

celest stump
#

right

weary widget
#

that is
$$

celest stump
#

(k=1-m,-1+2k=2+m,-2+3k=-n)

weary widget
#

ok

#

It's a multi-variable equation

celest stump
#

yeah..

weary widget
#

well

#

put the numbers right and the variables left.

celest stump
#

$(1=-m-k,1=m-2k,-2=-n-3k)$

ocean sealBOT
#

Joshii

weary widget
#

How did you get $k=1-m$ to $1=-m-k$?

#

ocean sealBOT
#

1048576Prog

celest stump
#

oops

#

$(1=m+k,1=m-2k,-2=-n-3k)$

weary widget
#

ok

ocean sealBOT
#

Joshii

weary widget
#

$([A]1=m+k,[B]1=m-2k,[C]-2=-n-3k)$

ocean sealBOT
#

1048576Prog

weary widget
#

just a label

#

what will have if $A-B$

ocean sealBOT
#

1048576Prog

weary widget
#

for both side of the equation

celest stump
#

$0=-3k$

ocean sealBOT
#

Joshii

weary widget
#

$\implies$?

ocean sealBOT
#

1048576Prog

celest stump
#

k=0?

weary widget
#

Yeah.

celest stump
#

can i sub that in everywhere?

weary widget
#

replace $k$ to $0$ for $[A],[B],[C]$.

ocean sealBOT
#

1048576Prog

weary widget
#

Then it is a bi-variable equation.

#

and it can be solved.

celest stump
#

$(1=m, 1=m,-2=-n)$

ocean sealBOT
#

Joshii

weary widget
#

ok. so we can solve $(k,m,n)=?$

ocean sealBOT
#

1048576Prog

celest stump
#

$(1,1,2)$

ocean sealBOT
#

Joshii

weary widget
#

k=1???

celest stump
#

oh oops sorry

#

(0,1,2)

weary widget
# celest stump

just, check it. check if $(0,-1,-2)+k(1,2,3) = (1,2,0)+m(-1,1,0)+n(0,1,-1)$.

ocean sealBOT
#

1048576Prog

weary widget
#

Oh it is just a sketch, maybe some calculation in it is wrong. check it. But you know how to solve multi-variable equation.

celest stump
#

yes now i do

#

$(k=1-m,-1+2k=2+m+n,-2+3k=-n)$

ocean sealBOT
#

Joshii

celest stump
#

$(1=k+m,-3=m+n-2k,-2=-n-3k)$

ocean sealBOT
#

Joshii

celest stump
#

can i do B + C? @weary widget

#

mv,

#

nvm

weary widget
#

Yeah.

#

you can do anything algebraic

#

because $P=Q,R=S \implies P \circ R = Q \circ S$

ocean sealBOT
#

1048576Prog

celest stump
#

but now i cant get rid of 2 variables

weary widget
#

?

celest stump
#

like if i subtract/add i'll be left with 2 variables

celest stump
weary widget
#

OK

#

what's the equation

celest stump
#

$(1=k+m,-3=m+n-2k,-2=-n-3k)$

ocean sealBOT
#

Joshii

weary widget
#

B+C, then?

celest stump
#

$(-5=m-5k)$

ocean sealBOT
#

Joshii

weary widget
#

so solve the equation with $[A]$ and $[B]+[C]$.

ocean sealBOT
#

1048576Prog

celest stump
#

oh i see

#

$(6=-4k-3)$

ocean sealBOT
#

Joshii

celest stump
#

i must of done something wrong

#

oh i think i did wrong order

#

$(1--5=m-m+k--5)$

ocean sealBOT
#

Joshii

celest stump
#

$(6=0+6k)$

ocean sealBOT
#

Joshii

celest stump
#

$k=1$

ocean sealBOT
#

Joshii

celest stump
#

$(k=1,m=0,n=-1)$

ocean sealBOT
#

Joshii

celest stump
#

thats not the answer tho

#

:(

#

<@&286206848099549185>

sly spade
#

What's your question again?

celest stump
lone heartBOT
#

@celest stump Has your question been resolved?

odd edge
#

Or at least help you see how to figure out how to solve with math

celest stump
#

the way @weary widget said to do it is right im just messing up somewhere

lone heartBOT
#

@celest stump Has your question been resolved?

lone heartBOT
#

@celest stump Has your question been resolved?

lone heartBOT
#
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Read #❓how-to-get-help for further information on how to ask a good question, and about conduct in the question channels.

minor aspen
#

i really dont understand how this happened, why did the + change to - after moving j to the numerator

minor aspen
#

and how can we even move it up there

#

what rule is that haha

visual stream
#

everyone

#

The latest definition of time and space
four-dimensional
is achievable

Light distorts space, but time does not, time is like a circle

I do not like China
You can use translation software to translate Chinese
Thanks------

minor aspen
#

sry what

visual stream
#

Discovering patterns can make powerful bombs

minor aspen
#

are you real? @visual stream

visual stream
#

the light just like this

#

you can think this no real

alpine sable
#

You sound like you tried to Google Translate your messages but accidentally translated them back and forth 20 times

minor aspen
#

hahahah

#

fr

visual stream
#

but you know the light and time and space very like

minor aspen
#

yes yes very

#

.close

lone heartBOT
#
Channel closed

Closed by @minor aspen

Use .reopen if this was a mistake.

visual stream
alpine sable
#

hello china people

visual stream
#

you can get important thing in the picture

#

if the time and the space like this picture

#

what mean ?

#

all of the science is a wrong,maybe

lone heartBOT
#
Available help channel!

Send your question here to claim the channel.

Remember:
Ask your math question in a clear, concise manner.
Show your work, and if possible, explain where you are stuck.
After 15 minutes, feel free to ping <@&286206848099549185>.
• Type the command .close to free the channel when you're done.
• Be polite and have a nice day!

Read #❓how-to-get-help for further information on how to ask a good question, and about conduct in the question channels.

visual stream
#

four-dimensional can give us a turth

lone heartBOT
#

Please don't occupy multiple help channels.

ornate leaf
#

我懂中文

#

i can have a shot at translating

visual stream
#

可以的

ornate leaf
#

等等

#

兄弟

#

你是不是走錯路了

visual stream
#

ornate leaf
#

這裏是求助channel

visual stream
#

我不像你这么爱这个国家(中国)

ornate leaf
#

誰説我愛國

#

只不過懂中文而已

#

跟愛國拉不上丁點關係

visual stream
ornate leaf
#

#

個人有保留

visual stream
#

我希望有人可以掌握时间

ornate leaf
#

美國與中國也不是很好啦

visual stream
#

很空间

ornate leaf
#

#

也合理

#

#

其實最好的結果一定是世界和平啦

#

等等等等

#

你怎麽上discord

visual stream
#

科技最好的结果是造福世界

subtle birch
#

wow

ornate leaf
#

大陸不是把discord禁了嗎

#

vpn?

visual stream
#

拜拜了

ornate leaf
#

#

好啦好啦

#

拜拜

#

.close

visual stream
#

有缘再见

ornate leaf
#

有緣再見

keen plinth
minor aspen
#

is that a bot

keen plinth
#

no

subtle birch
#

檢測到中國玩家

ornate leaf
#

who

#

who's a bot

minor aspen
#

even in chinese he doesnt make sense ?

ornate leaf
#

wdym

#

me?

#

me or the other person

minor aspen
#

no haha

keen plinth
#

idk what you're talking about

ornate leaf
#

no i think he makes sense

keen plinth
#

yeah

ornate leaf
#

hes just very against china

keen plinth
#

definitely not bot

#

lol

ornate leaf
#

yeah

#

its more like

#

bots arent allowed to have that kind of opinion

keen plinth
ornate leaf
#

it would be abolished by china otherwise

#

oop

keen plinth
#

i suppose he left

minor aspen
#

why is it in the math channel tho

ornate leaf
#

it started out as math but then like

keen plinth
#

close or not thonk

ornate leaf
#

not yet

ornate leaf
#

his native language is probably chinese

#

but then he said stuff like

#

nah i dont like china and shit

subtle birch
#

you know chinses or like you use translator

minor aspen
#

oh wait you actually thought he's not a bot?

ornate leaf
#

but then it devolved into some political conversation lmao

thorn tapir
keen plinth
#

that was so random

ornate leaf
#

the thing in my pfp are my chinese exams

#

reading and writing

keen plinth
ornate leaf
#

no bot speaks like that

#

no its more like

#

no bots are allowed to speak like that

#

or else china's gonna come in do shit

keen plinth
#

no bot just leaves half way through a conversation Xd

minor aspen
#

ahaha true

ornate leaf
#

yeah

minor aspen
#

he just came here to discuss the world state real quick

#

and peaced out

ornate leaf
#

sanest chinese citizen

subtle birch
#

fr

keen plinth
#

kinda random

#

.close

lone heartBOT
#
Channel closed

Closed by @keen plinth

Use .reopen if this was a mistake.

visual stream
lone heartBOT
#
Available help channel!

Send your question here to claim the channel.

Remember:
Ask your math question in a clear, concise manner.
Show your work, and if possible, explain where you are stuck.
After 15 minutes, feel free to ping <@&286206848099549185>.
• Type the command .close to free the channel when you're done.
• Be polite and have a nice day!

Read #❓how-to-get-help for further information on how to ask a good question, and about conduct in the question channels.

minor aspen
lone heartBOT
ornate leaf
alpine sable
long axle
visual stream
#

What is the CHAT GPT neural network element like?

alpine sable
#

hmmmmmmge

#

how many hmmges do you have xd

keen plinth
#

5

#

thats it

#

im out

alpine sable
#

ran out of hmmges 😔

keen plinth
#

well

#

.close

lone heartBOT
#
Channel closed

Closed by @keen plinth

Use .reopen if this was a mistake.

visual stream
#

Free neurons are better than CAHT GPT

alpine sable
#

inb4 this gets reopened for like another 3 times

keen plinth
alpine sable
#

pop off !! 😎

minor aspen
#

you know?