#help-36

1 messages · Page 170 of 1

soft zealotBOT
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gfauxpas

tranquil pine
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Updating limits?

ripe jewel
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yeah that was that

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and

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$$\frac{1}{\sqrt 5} , \mathrm dx = 2 \sec \theta \sec \theta \tan \theta , \mathrm d\theta$$

soft zealotBOT
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gfauxpas

tranquil pine
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This seems complex

ripe jewel
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$$\int_{\arctan(1/5)}^{\arctan((t+1)/\sqrt 5} \frac{2\sqrt 5 \sec^2 \theta \tan \theta , \mathrm d\theta}{1+\tan^2 \theta}$$

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hmm what happened

tranquil pine
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$$\int_{\arctan(1/5)}^{\arctan((t+1)\sqrt 5} 2\sqrt 5 \dfrac{\sec^2 \theta \tan \theta , \mathrm d\theta}{1+\tan^2 \theta}$$

ripe jewel
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see the problem?

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

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

tranquil pine
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$$\int_{\arctan(1/5)}^{\arctan((t+1)\sqrt 5} 2\sqrt {5} \dfrac{\sec^2 \theta \tan \theta , \mathrm d\theta}{1+\tan^2 \theta}$$

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

ripe jewel
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$$\int_{\arctan(1/5)}^{\arctan((t+1)\sqrt 5)} 2\sqrt 5 \dfrac{\sec^2 \theta \tan \theta , \mathrm d\theta}{1+\tan^2 \theta}$$

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there we go!

soft zealotBOT
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gfauxpas

ripe jewel
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okay but this isnt bad

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because 1+tan^2theta = sec^2 theta

tranquil pine
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Ye gets canceled

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Integration of tan theta is log of sec theta

ripe jewel
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okay ill skip the rest but

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you see how to do it now

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in the simple case of

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$$\int_0^t \dfrac{\mathrm dx}{x^2 + 1}$$

soft zealotBOT
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gfauxpas

tranquil pine
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Ooh

ripe jewel
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you get arctan(t) exactly

tranquil pine
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Cool

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Btw

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Do u have any tips fo integration?

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For*

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Solving methods as well as tricks if u know any

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School level is enough yk

ripe jewel
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just, look at a lot of different approaches so youre exposed to new techniques

tranquil pine
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Oh

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Ok

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Thanks for the help yall

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.close

final saddleBOT
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wanton crater
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so i was doing this

i solved it and i tried to check my answer but the derivative calculator says its wrong

wanton crater
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i aded both to desmos and the graphs seem to overlap

lusty seal
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twin

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just include one x inside the square root

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what do we get

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include 3x

lime crest
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arcsech(3x)🥀

magic coyote
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Welcome to mathcord Licht! MenheraFingerGuns

lusty seal
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x multiplied by 3x sqrt (1/9x^2 - 1) = x sqrt(1-9x^2)

lusty seal
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fellow tensura enthussiast

wanton crater
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so any idea why does it say theyre not equivalent think

shrewd nexus
lusty seal
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the calculator us tweaking

lusty seal
wanton crater
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i tried wolfram too but it also gave some weird form

lusty seal
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x^2 is outside the square root

lusty seal
wanton crater
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ok so the answer i got is correct then ya?

lusty seal
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both sre right

wanton crater
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ok i was like triplechecking cuz it was just basic product rule i thought

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ok ty thats all then

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.close

final saddleBOT
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soft zealotBOT
final saddleBOT
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final saddleBOT
vital crag
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,calc sqrt(17)^2 + (4 * sqrt(17))^2

soft zealotBOT
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Result:

289
vital crag
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,calc 17^2

soft zealotBOT
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Result:

289
vital crag
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,tex .half angle

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which half angle identity did you try to use

soft zealotBOT
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riemann

vital crag
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,tex .double angle

soft zealotBOT
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riemann

vital crag
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i see yes you did

final saddleBOT
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vital crag
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oh we helped you cheat on your test? nice

final saddleBOT
terse crypt
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riemann got manipulated ):

ripe jewel
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criz might have meant that he used the server to study for the test

terse crypt
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having prior knowledge regarding the exam's content is cheating

ripe jewel
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idk the context so ill step out

faint edge
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The thing they were asking about was definitely already graded so cheating on that seems hard.

sage meteor
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studying is doubting your potential eeveethink

cyan kayak
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🥀

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final saddleBOT
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tranquil pine
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Hello KEK

agile nacelle
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This channel is closed. Please claim an open one.

tranquil pine
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Okay

final saddleBOT
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kindred cove
final saddleBOT
kindred cove
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<@&286206848099549185>

uncut flint
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dont ping helpers immediately

lusty seal
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😭

tribal jackal
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!15mins

final saddleBOT
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Please only use the <@&286206848099549185> ping once if your question has not been answered for 15 minutes. Please do not ping or DM individual users about your question.

wicked mortar
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Frr

tepid narwhal
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and basically numerator should be 180 degrees

tepid narwhal
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[Your number]* (180 degree/pi)

kindred cove
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14*180degrees/pi ?

tribal jackal
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14/9 * 180/pi

tepid narwhal
tribal jackal
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$\frac{14\pi }{9}*\frac{180}{\pi}$

soft zealotBOT
kindred cove
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so 280 degrees

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and how to do it the other way

tepid narwhal
tepid narwhal
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180/pi ---> pi/180 degrees

kindred cove
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huh?

tepid narwhal
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so that degrees cancels out

tired walrus
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@kindred cove do you know how to do unit conversions generally?

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like between m and km, or minutes and seconds, or feet and inches

tepid narwhal
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$280 degrees \cdot \frac{pi}{\180i}$

tired walrus
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\cdot for multiplication btw

kindred cove
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yes

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oh okay

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so 180/pi is always needed

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alright thanks

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.finsihs

tepid narwhal
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yea

kindred cove
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.finish

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.end

tribal jackal
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.close

kindred cove
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.close

final saddleBOT
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tepid narwhal
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is .close

patent rune
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I have a placement test for honors math

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Pls help me

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Today

sour zealot
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!occupied

final saddleBOT
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Someone else is already using this help channel. If you need help with a question, please open your own help channel/thread (see #❓how-to-get-help for instructions).

patent rune
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😢ok

steep nest
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@patent rune

patent rune
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thx both of you

final saddleBOT
#
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nocturne cedar
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Find X

final saddleBOT
nocturne cedar
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I thought this was gonna be easy until I saw F wasn’t completing a triangle

severe verge
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ABCD is a parallelogram?

nocturne cedar
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Yes

severe verge
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find the value of x?

nocturne cedar
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Yes

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I did this so far

ornate flower
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How do you have EB ?

severe verge
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notice that DF is the height of the parallelogram dropped from D

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there's no need for pythagoras here

nocturne cedar
severe verge
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do you notice the idea?

nocturne cedar
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U mean DE

severe verge
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DE and DF are both heights of the parallelogram

nocturne cedar
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How

severe verge
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it's just they have different bases

nocturne cedar
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Oh

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One is sideways?

severe verge
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yeah

nocturne cedar
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Ok

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How does that help

severe verge
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there's a simple idea here we can use

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what is the formula for area of a parallelogram?

nocturne cedar
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Idk I haven’t memorized that but I probably should

severe verge
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you really should

nocturne cedar
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Oh it’s really simple

severe verge
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otherwise this is gonna get a little complex with similar triangles and stuff

nocturne cedar
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A = bh

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Basically the triangle without the divided by 2

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Ok so the area is 200

severe verge
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alr now you should be able to find x easily

nocturne cedar
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What

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How

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Oh

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8*25=x*10

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?

severe verge
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yeah

nocturne cedar
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Dang

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Does that means rectangles have 2 different heights too?

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And triangles

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Some

severe verge
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triangles have 3

nocturne cedar
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Not all right

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An equilateral one has 1 height

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Well 3 heights with the same value

severe verge
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they have 3 but they have the same length

nocturne cedar
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This is useful I think

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Might help with a lot of other stuff

severe verge
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yea switching between heights and bases is what they use to torture 5th graders here

nocturne cedar
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Where do you live

severe verge
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vietnam

nocturne cedar
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Wdym switching between heights and bases

nocturne cedar
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Oh like what I just did

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😭

severe verge
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exactly

nocturne cedar
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Lowkey isn’t even hard I just didn’t know about the concept

severe verge
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"isnt even hard"

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muahahahaha

nocturne cedar
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😭

severe verge
nocturne cedar
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Gonna need a translation

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Even with translation I can’t do it though so

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Save your fingers

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😔

severe verge
nocturne cedar
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Imma close this

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Tysm for the help man

severe verge
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no problem

nocturne cedar
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.close

final saddleBOT
#
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final saddleBOT
#
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quasi plume
#

how?

final saddleBOT
rocky tusk
quasi plume
rocky tusk
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$\int_{-a}^a f(x) \dd{x} = 2\int_0^a f(x) \dd{x}$

soft zealotBOT
rocky tusk
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if f is even

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and if f is odd you have

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$\int_{-a}^a f(x) \dd{x} = 0$

soft zealotBOT
quasi plume
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this is what u mean right

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even and odd

rocky tusk
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yea

quasi plume
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okay bet tysm

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final saddleBOT
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gray ocean
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9 - x² da y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx19 V = x [-x-12 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx 19 V = x [-x-12x3-7 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi 12 (x4 - 19x2 - 14x + 32 9 - x² y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (X4 - 19x2 - 14x + 32) dx19 V = x -x-12 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx 19 V = x [-x-12x3-7 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) 9 - x² produce y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx19 V = x [-x-12 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx 19 V = x [-x-12x3-7 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V =230

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9 - x² da y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx19 V = x [-x-12 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx 19 V = x [-x-12x3-7 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi 12 (x4 - 19x2 - 14x + 32 9 - x² y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (X4 - 19x2 - 14x + 32) dx19 V = x -x-12 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx 19 V = x [-x-12x3-7 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) 9 - x² produce y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx19 V = x [-x-12 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx 19 V = x [-x-12x3-7 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V =230

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9 - x² da y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx19 V = x [-x-12 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx 19 V = x [-x-12x3-7 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi 12 (x4 - 19x2 - 14x + 32 9 - x² y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (X4 - 19x2 - 14x + 32) dx19 V = x -x-12 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx 19 V = x [-x-12x3-7 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) 9 - x² produce y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx19 V = x [-x-12 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx 19 V = x [-x-12x3-7 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V =230

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9 - x² da y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx19 V = x [-x-12 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx 19 V = x [-x-12x3-7 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi 12 (x4 - 19x2 - 14x + 32 9 - x² y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (X4 - 19x2 - 14x + 32) dx19 V = x -x-12 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx 19 V = x [-x-12x3-7 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) 9 - x² produce y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx19 V = x [-x-12 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx 19 V = x [-x-12x3-7 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V =230

#

9 - x² da y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx19 V = x [-x-12 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx 19 V = x [-x-12x3-7 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi 12 (x4 - 19x2 - 14x + 32 9 - x² y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (X4 - 19x2 - 14x + 32) dx19 V = x -x-12 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx 19 V = x [-x-12x3-7 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) 9 - x² produce y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx19 V = x [-x-12 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx 19 V = x [-x-12x3-7 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V =230

#

9 - x² da y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx19 V = x [-x-12 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx 19 V = x [-x-12x3-7 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi 12 (x4 - 19x2 - 14x + 32 9 - x² y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (X4 - 19x2 - 14x + 32) dx19 V = x -x-12 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx 19 V = x [-x-12x3-7 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) 9 - x² produce y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx19 V = x [-x-12 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V = π12 (x4-18x² + 81) - (x² + 14x + 49) dx V = pi / 12 (x4 - 19x2 - 14x + 32) dx 19 V = x [-x-12x3-7 y = x + 79 - x² = x + 7 x = 1 y x = -2 V = π112 (9-x2) ² - (x + 7) 2dx V =230

final saddleBOT
#
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coral wedge
#

anyone know how even functions work on a table?

coral wedge
#

This table for example

uncut flint
#

|x| yields the same f(x)

#

like its symmetrical at x=0

coral wedge
uncut flint
#

yeah because its symmetrical

coral wedge
#

and then for odd funcs it’s just both signs flip?

uncut flint
#

f(-x)=f(x)

uncut flint
coral wedge
uncut flint
#

wait inthibk i weotr that wrong

coral wedge
uncut flint
#

f(-x)=-f(x)

#

yeah

#

thats odd

coral wedge
#

okayy

dapper hull
#

$odd: f(-x)=-f(x) , even: f(-x)=f(x)$

soft zealotBOT
#

qimmah

coral wedge
#

got ittt, that’s what I thought it was

#

And then just apply this same idea when given tables

#

or ig it’s just visual on tables

uncut flint
#

yup

dapper hull
#

yes and in graphs
evens are symmetric along the y-axis
whilst odds are symmetric along the origin

coral wedge
dapper hull
coral wedge
#

thanks for the help guys!!

#

.close

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#
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dapper hull
#

Just want work checked

final saddleBOT
dapper hull
#

question was

#

$\int \frac{x^2 \ln{x}}{(1+x^3)^2} dx$

soft zealotBOT
#

qimmah

dapper hull
edgy mauve
#

Seems correct
Last line-closing bracket is missing

dapper hull
#

.close

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#
Channel closed

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edgy mauve
#

@dapper hull
Did u consider 1/(1+a)² as v?

edgy mauve
#

Why tho

dapper hull
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felt the integral of ln(a) is a little messy for the working

edgy mauve
#

Yeah got it

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Thanks

dapper hull
edgy mauve
#

Wdym

dapper hull
#

simply it made things messier

edgy mauve
#

Well it did make me confused
But that step was cool

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

im baacckkk

final saddleBOT
hollow hedge
#

how do i do this?

#

doesnt look too hard im just confused where on the line i plot the points

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anyone know how these work?

deep condor
hollow hedge
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wait do i have to do real math or can i just read the formulas and plot points

deep condor
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yes, the math you are doing is over the real numbers so it's real math KEK

hollow hedge
#

no i mean do i have to solve equations or are the answers in the formula

deep condor
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sorry. no equations, just subbing in the x-values into the proper part of the function

hollow hedge
#

how do i know what formula is what line

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second is the straight line im assumiung

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first is red?

deep condor
hollow hedge
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idk what the square root means thats whats confusing

deep condor
#

well, look at the slope of the red and blue lines

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out of x^3 and sqrt(x), which do you think would have the steeper slope? i.e. which one increases quicker?

hollow hedge
#

i might just get it wrong and get a new question

#

i only have 1 attempt and im not confident at all

deep condor
#

i think you've nearly got this one, if you're not sure i can walk you through it a bit

hollow hedge
#

tbh i have to do this whole module in one day and ive literally done 7 hours of math so far

#

my brain is cooked

#

its hard to think

#

i have 2 more units to do and i have 2 hours

#

and the next unit is so complex its nauseating

deep condor
#

my advice would be to take a break, let the math simmer in the back of your mind, then hopefully your intuition will be a little better to finish it off

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but idk your life and im not your dad

hollow hedge
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i cant i just took an hour and a half break and 2 hours for 2 units is cutting close on the place i have been on

#

so just explain things more indepth and laymans term-like i guess

#

not trying to trauma dump my day lol just need a little more help

deep condor
#

no fair enough

#

these functions are elementary enough that i'll just show you some, hang on

hollow hedge
#

i just dont understand what each section of the formula correlates too

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for the line one do i put it flat on negative 2?

deep condor
#

yes, flat, because it's a constant line

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if you had -2x, it can vary in height, because x is a variable

deep condor
hollow hedge
#

are red and blue right?

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if you make purple flat thats my best attempt

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BRO I HAD THE WHOLE THING RIGHT AND BLUE IS ONE POINT OFF

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fuck math

deep condor
#

oh you only need to drag the x value, not even the y

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or am i wrong

hollow hedge
#

it like follows a line

deep condor
#

red looks correct, but your blue starts at 2 instead of 4

hollow hedge
#

yea i got it wrong sadly

deep condor
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oh that helps

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yeah, because x >= 4, your sqrt(x) line should start at 4

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does sqrt(x) include the endpoint, and why?

hollow hedge
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idk what u mean

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yea honestly its just hard to think with that many variables right now

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i like step 1 2 3 kinda math

deep condor
#

the endpoint on sqrt(x) (the blue), is that included or not?

hollow hedge
#

yea blue was supposed to be 4

deep condor
#

yeye but

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you have to choose if the endpoints are included or not, yes?

hollow hedge
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yea if they are holo or whole

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but ik thats if its equals to or not

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i have to predict what this looks like

deep condor
#

i think it would be best to mess around with this graph first and get a feel for which lines are which

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oh i forgot constant lines. eh you know them

hollow hedge
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yea its not helpful i think im using it wrong

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im on a time crunch

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i got it qright

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my fucking mortal enemy

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what do i do if its just x < 0

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this ones more complicated ngl

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3 is purple

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do i start on 0?

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is it infinity

dense badge
#

what’ the value of x^2-2 when x=0?

hollow hedge
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-2?

dense badge
#

So you know the red parabola has the open endpoint at (0,-2)

hollow hedge
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open?

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im assuming

hollow hedge
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closed to include -2

dense badge
hollow hedge
#

huh

tiny barn
#

open end point is just hollow circle that implies that point is not included

dense badge
#

now what is the minimum y value, x^2-2 can take

hollow hedge
#

im confused

#

does this look right?

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my best attempt

tiny barn
#

bro i really want to just give u the answers since ur so tight on time LMAO

tiny barn
hollow hedge
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which ones wrong

dense badge
hollow hedge
#

is purple right?

tiny barn
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no

hollow hedge
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kinda educated guess on blue

tiny barn
#

how many problems do u have oleft

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and time

hollow hedge
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hour and a half 20 problems

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and the next unit idont understand at all

tiny barn
#

im just gonna explain piecewise fucntions to u lmk if u dont understand

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so you know how the functions are f(x), and f(x) is just a y value that you get after plugging a x value in

hollow hedge
#

wtf do i do when its not giving me 2 points

tiny barn
#

basically in your case the problems are giving you some ez functions to plot piecewise funcions, what u r doing is just plotting the actual functions except, on the right of the functions there is a domain, which is the restriction of the given functions

hollow hedge
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lwk might just get this wrong its been 20 minutes and im not any closer

tiny barn
#

so simple words u r just plotting the functions in the giving restriction and erasing it if its not inside the domain

#

just draw the function in the domain, and deterine if endpoints are included by looking at inequality sign

hollow hedge
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i have 2 end points and only 1 number

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thats all im confused about atm

#

i appreciate the help

tiny barn
#

so for example f(x) = 1 just means y=1, so its just a horizontal line, and the domain is x>4, so u r just plotting y=1 starting at x = 4 and its going to the right cuz its increasing

hollow hedge
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is that not what purple is rn?

tiny barn
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and its not included because x is greater than 4 and not greater and equals to 4

hollow hedge
#

or is purple supposed to be blue

tiny barn
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the purple is supposed to start AT x=4 and going to the right

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right now its at 0<x<4

hollow hedge
#

im so lost what do i do with the other point then

tiny barn
#

like its in between the x-values 0 to 4, its supposed to be greater than 4 so it starts at 4 and goes to the right cuz x coordinate starts increasing going to the right

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just drag it off the scren im assuming...

hollow hedge
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i cant do that

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im gonna assume that thats supposed to be blue

tiny barn
#

@dense badge am i getting something wrong its just f(x)=1 starting at x=4 going to the right forever no?

hollow hedge
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now what do with purple

dense badge
#

no you good

tiny barn
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just do this but start at 4

dense badge
#

i’m just not a fast typer

tiny barn
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point not included because its not greater AND equals, its just greater

hollow hedge
#

i did that

tiny barn
#

its 0<=x<=4 right?

hollow hedge
#

x+1 0<x<4

tiny barn
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so purple only "exists" values between those x values

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yes the function is x+1

hollow hedge
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x+1 is slope?

tiny barn
#

so do u know how to draw x+1

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yes

hollow hedge
#

yes

tiny barn
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its not just x+1, its f(x)=x+1 and only "exists" between 0 and 4

dense badge
#

it’s x+1 for the interval [0,4]

tiny barn
#

yes

hollow hedge
tiny barn
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and the points are included because x can be equal to 0 and 4

hollow hedge
#

correct?

dense badge
tiny barn
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look at inequality sign

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and blue is NOT included

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because it will not be equal to 4

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cuz x>4 not x>=4

dense badge
#

what’s x+1 when you plug x=0?

hollow hedge
dense badge
#

bingo

tiny barn
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looks right to me

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next question

hollow hedge
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nah that’s supposed to be the right answer

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like i got it wrong

tiny barn
#

💀

hollow hedge
#

spent 30 minutes and got it wrong 😾

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lwk starting to tweak out

tiny barn
#

blud next time just wait for us to finish typing

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is there next problem? u dont have muhc time left right

dense badge
#

what’s x^2-2 at x=-1?

tiny barn
hollow hedge
tiny barn
#

this one is ez if u undestood what i was saying to u just compare the graphs

hollow hedge
#

is it b

tiny barn
#

i can give u a hint look at the y interceptss

hollow hedge
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bc 2x-3 is slope and y

tiny barn
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cuz idk wut u r trying to say

hollow hedge
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uh -3 is the y and 2x is the slope

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and the other 4 are wrong for that line

#

process of elimination

tiny barn
#

yes -3 is the y intercept

hollow hedge
#

rut row

dense badge
#

start with the constant function

tiny barn
#

try it first so we can help u

hollow hedge
#

i am

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which ones the red line

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oh

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middle

tiny barn
#

which one do u think is the NOT striaght line of the 3

dense badge
#

you can deduce it from the other two yeah

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it’s-x^3 yeah

hollow hedge
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idk where to put it

#

-2 1

tiny barn
#

whats the domain

hollow hedge
#

-2?

dense badge
#

check the end points

tiny barn
#

domain is -2<=x<1

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so its between these 2 numbers

hollow hedge
#

its either -1,-1 1,1 0,0

tiny barn
#

and u get the right y-values by plugging the x values

hollow hedge
#

1,1?

tiny barn
#

idk what ur trying to say

hollow hedge
dense badge
#

what’s -x^3 when x=-2?

hollow hedge
#

best attempt

tiny barn
#

go do the other 2 first they r slightly easier

hollow hedge
#

i literally have to get this right

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the next unit is real equations tahnk god

dense badge
#

again you can’t have overlap the function f(x) can only spit out one output for each x input

tiny barn
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i dont htink u r listening u r just placing random stuff on the graph, think abt the domain first, which x-values does the graph "exist"/reside in

hollow hedge
#

all the lines i placed i used like basic logic its not like im just guessing at random

dense badge
#

educated guessing

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the constant is kinda ok

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maybe try the line

tiny barn
#

try the lines first just ignore curve

#

they r easier

dense badge
tiny barn
#

think abt which x-values they start at

dense badge
#

this say f(x) outputs x+2 when x is less than -2

hollow hedge
#

x+2 is the slope and the y intercept thats why purple is where it is and 3 is the y so its straight so i just slapped it on 3

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thats the way im thinking about it

#

im 8 hours into this math session my brain is soup its hard to understand new concept

#

try to explain it

#

just anxious asf i planned on being done with this 20 minutes ago

#

im for sure not finishing both in time

tiny barn
#

you will finish on time if the rest r just easy equation algebra solving problems dw its just hard to help with grpah plotting problems without drawing

#

x+2 is equation, u draw it starting at x=-2 and it goes to the left because its values r smaller than -2

#

is this part ok?

hollow hedge
#

the other ones are inverse equations and im not too bad at them

#

why negative 2

tiny barn
#

beacuse it tells u x < -2

dense badge
#

the graph of f(x), the curve you try to draw is the set of points of the form (x,f(x))

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here f(x) is defined by part meaning different range of x different procedure to get the output

#

so for x<-2 f(x) is computed by adding 2 to x

tiny barn
#

just look at this graph u r just drawing the shaded area

hollow hedge
#

it reset me omfg

#

sorry

#

honestly

dense badge
hollow hedge
#

it shouldnt be this diffivcult

tiny barn
#

its fine i undestand u r like low on time and youve been wokring for too long so just try to do as fast as u can and finish so u can take a break

dense badge
#

the time constraint is impeding you from understanding sadly

tiny barn
#

this is first equation

hollow hedge
#

its like IXL it resets you if you get it wrong

#

i just wanted to watch the video explanation and it reset me

#

i didnt even get to answer

tiny barn
#

ok just skip it for now then ig and do this one

hollow hedge
#

i got it right

#

those arent hard its graphing thats hard

dense badge
hollow hedge
#

honestly this makes me feel like i have down syndrome like i take upper division classes and destroy them and then this shit kills me

#

its so frustrating

#

92 in anatomy and i cant do graphs

tiny barn
#

allg u r just stressedcuz ur running out of time

hollow hedge
#

best attempt

tiny barn
#

looks good

hollow hedge
#

im doing inverse functions

#

well

#

idk why but the inverse function unit was 4 questions

#

I have 50 minutes to slay this fucking titan

#

explain away i have time now

tiny barn
#

i think u should take like a 5-10 minute break

#

if u have a lot of time

hollow hedge
#

this is the last question

tiny barn
#

u will definitely efel better

dense badge
#

bro wants closure

tiny barn
#

yes which is y i want our explanation to actually make sense to u

hollow hedge
#

ok

dense badge
#

what’s f(4)?

tiny barn
#

bro went to take a break

#

bros thinking about slaying the titan

hollow hedge
#

just playing rocket league

#

that titan never dies unfortunately

hollow hedge
#

game time

tiny barn
#

welcomeback

hollow hedge
#

best attemot

tiny barn
#

purple starting point is good and endpoint is correct

#

however your slope is not correct

#

whats the slope of f(x)=x+2?

hollow hedge
#

2

#

so rise 1 run 2?

#

or is it just 2 2

dense badge
#

easy fix: blue not high enough

tiny barn
#

its 1/1 because x is not getting multiplied by any number

hollow hedge
#

oh mb i meant to put it on 3

#

attempt 2

#

is it right?

#

i refuse to lose progress atp

tiny barn
#

looks good bro

#

i think u got it

hollow hedge
#

sweet

#

thank you

#

longest 9 hours of my whole life omg

#

im gonna play the game and destroy my cart now

#

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dense badge
#

thing is done

#

gg

#

!rats

final saddleBOT
tiny barn
#

w closure

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fresh basin
#

the answer says each triangle is 1/4 of the square but without assuming that the top vertex is at the centre of the square how would we figure that out?

inner acorn
#

well it is not assuming that the top vertex is the center

#

it can be proved that the top vertex IS the center

fresh basin
inner acorn
#

um, kinda hard to explain without drawing

fresh basin
inner acorn
#

the thing is, if you can prove that so example this triangle is a 90,45,45 triangle, then it is easier to see

fresh basin
inner acorn
#

the one on the right

fresh basin
#

i think i get it

inner acorn
#

yeah

fresh basin
#

alr tysm

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mortal moat
#

hello

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.reopen

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tranquil pine
final saddleBOT
tranquil pine
#

there's a hint

#

but how can i find the radical axis of these 2 circles

#

maybe i constructed it wrong because we need AQ' to be tangent to the circle Q'RS

#

idk im confused

final saddleBOT
#

@tranquil pine Has your question been resolved?

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@tranquil pine Has your question been resolved?

fiery bluff
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novel kettle
#

im not getting any real solutions for x

final saddleBOT
novel kettle
#

am i missing something or is the question wrong

#

terms are 1-indexed btw

robust mulch
#

i get x=10 as a solution

#

did you put the binomial coefficient 6C3?

novel kettle
#

yeah

robust mulch
#

oh wait i didnt flip the sign on the log term

#

yeah i looked on wolframalpha and it has no real sols

novel kettle
#

damn

robust mulch
#

maybe the question writer wanted a - instead of a + before the log

novel kettle
#

hmm

#

that gives me cbrt(10000)

#

but the options are 100, 10, 1 and 1/sqrt(10)

#

they probably made a mistake somewhere else im not gonna dwell on it

#

thanks

#

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fossil plaza
#

given the function f(x,y)= from the image above for x,y /= 0,0

and f(x,y)=0 for x,y=0

study its continuity

novel kettle
#

the usual argument when discussing continuity is to take limits at the problematic points (in this case, x = y = 0)

#

if any limit where x,y approaches 0,0 equals f(0,0), then the function is continuous

fossil plaza
#

ok

novel kettle
#

since this is in two dimensions, you don't have a "left hand limit" and a "right hand limit"

#

there's infinitely many ways (x,y) can approach (0,0)

fossil plaza
#

yeah i know

#

but as you said i only need to check cases x=0 and y=0 right?

novel kettle
#

you either have to find a counterexample where the limit doesn't equal f(0,0) (i.e. the function is discontinuous)

#

or prove that it equals f(0,0) for every limit (i.e. the function is continuous at that point)

fossil plaza
#

how do i prove it for every limit

uneven python
#

Along x axis , it's 0

novel kettle
#

you need epsilon-delta

uneven python
#

Along y again 0

#

Check along the line maybe

#

Wait

fossil plaza
#

polar is easier

novel kettle
#

as in approaching from every possible angle?

uneven python
#

Mhm

#

Well if along line it's 0

#

Then ofc polar!?

#

I mean you could take r costheta and r sintheta

#

But what next?

fossil plaza
uneven python
#

R tends to 0?

novel kettle
#

that's still not enough, you also need to prove it for paths that are not a straight line

uneven python
#

Uh wait

novel kettle
#

like y = x^2

fossil plaza
#

so the only way is eplsion delta ?

uneven python
#

Y = mx try

novel kettle
#

yep

uneven python
mellow iris
novel kettle
#

it's 0 along the x and y axes

#

it's also 0 along any straight line path

uneven python
#

Yeah

#

So polar seems right

#

Something like this I'm doing

novel kettle
#

this isn't sufficient

fossil plaza
uneven python
uneven python
fossil plaza
#

yeah sorry

uneven python
#

Correct?

#

It's 0 tho

fossil plaza
#

this is what i did too but i do not know if it is correct

uneven python
#

Then limit exists fr

novel kettle
#

this isn't enough to say that the limit exists

uneven python
#

Function must be continuous at (0,0)

uneven python
novel kettle
#

let's take another function as an example
g(x,y) = 1 if y = x^2 and 0 otherwise

uneven python
#

At f(0,0) it is 0 right?

novel kettle
#

what's the limit of this function as (x,y) approaches (0,0)?

uneven python
#

@fossil plaza you have the answer?

fossil plaza
#

of what ?

uneven python
fossil plaza
uneven python
#

By my method you could absolutely say that the function is continuous at origin

novel kettle
#

but it doesn't

uneven python
#

We had (r,theta) → 0

fossil plaza
#

i mean it is a singularity but the limit does exist

novel kettle
#

if you approach it along any straight line path, the limit is 0
but if you approach it along y = x^2, the limit is 1

#

so the limit doesn't exist for the function i gave as an example

fossil plaza
#

ohh i see than that is correct

uneven python
#

The function is bounded to go zero bro

#

Go along y = 0 path

#

Then limit is zero

#

Go along x

#

Still zero

#

But in this

#

We can't bound the function

#

But with my method

#

The function goes zero as it is bound

novel kettle
uneven python
#

|f(x,y)| ≤ r² → 0

novel kettle
#

my point is you can't make a conclusion just by testing every straight line path

uneven python
#

Y = x² it's 0

#

x²/1+x²

#

Solve it bro

novel kettle
#

i'm not talking about the original function

uneven python
#

Oh

uneven python
#

This is absolutely correct tho

#

Since the function is bound

novel kettle
#

you need to use epsilon-delta if you want that to be rigorous

uneven python
#

Idk what 8k doing wrong

#

Bro but what's wrong with my method?

#

Wait then

#

Let's try epsilon delta

novel kettle
#

the limit of f(x,y) as (x,y) approaches (a,b) is L if and only if
for every epsilon > 0
there exists a delta > 0
such that if 0 < |f(x,y) - L| < epsilon
then 0 < |(x,y)-(a,b)| < delta

#

this is epsilon-delta

#

if you can prove this for L = 0 and (a,b) = (0,0), then f(x,y) is continuous at (0,0)

uneven python
#

0 < √x²+y² < epsilon

novel kettle
#

that's for delta

#

epsilon is the upper bound for the distance between the function's value and the limit

uneven python
novel kettle
#

other way around; 0 < |f(x,y) - L| < epsilon should imply 0 < |(x,y)-(a,b)| < delta

fossil plaza
#

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blissful zenith
#

Help

final saddleBOT
blissful zenith
#

I used another definition for topology generated by a basis, though I found myself more clear with it but I am unsure if my current approach is correct and whether it’s more clearer

#

It felt more constructive this way

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@blissful zenith Has your question been resolved?

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summer lynx
#

.

final saddleBOT
summer lynx
#

Im getting this as (tan theta)/2
And not tan (theta/2)

#

Nah im getting getting either of those

#

How do we get tan theta/2 here?

#

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round cedar
#

hey, i think im supposed to use the intermediate value theorem but im not sure about that

round cedar
#

any hint will be wonderful

#

but just hint not full ans

#

btw i made g(x)=f(x)+x and ik its continous between [-1,1]

terse crypt
#

-1 <= x <= 1

#

hmm

#

cant use that trick

round cedar
#

can i just say that becuz of IVT there must be a g(0)..? i think it aint much

meager mirage
#

Kinda

terse crypt
#

we have to prove that there exist g(x) that is positive and negative

civic sable
#

No information on its monotonie?

round cedar
#

cant use that monotonious thing yet

#

mainly limits and continous

meager mirage
#

g(x) = f(x) + x

#

And you need to prove g has to be zero within -1 to 1

round cedar
#

yeh

#

by just doing graphs i see it must have g(0)

round cedar
#

cuz 0 is between [-1,1]

terse crypt
#

-1 <= x <= 1
-1 <= f(x) <= 1
-2 <= g(x) <= 2

meager mirage
#

And use IVT

meager mirage
#

f(x) could be 1 when x is -1

round cedar
terse crypt
meager mirage
terse crypt
#

this is all the cases

stray sierra
civic sable
meager mirage
meager mirage
terse crypt
round cedar
meager mirage
civic sable
#

Try to deduce something from that

stray sierra
terse crypt
terse crypt
round cedar
meager mirage
#

That case sorts it out by itself

round cedar
#

but g cant be always positive or negative cuz then there was no g(0)

civic sable
round cedar
civic sable
round cedar
#

yeh and g1 = f1 +1

civic sable
#

-1 <= f(-1) <= 1

#

do you get where im going?

round cedar
#

maybe

#

few secs plz

round cedar
#

gg then

civic sable
#

so yeah

round cedar
#

yeh, then using ivt promises that there must be a root for g

#

thank you !

#

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tranquil pine
#

,,\int \frac{3}{(1-x)(1+x^2)},dx

final saddleBOT
soft zealotBOT
sage meteor
#

partial fractions

#

🤔

tranquil pine
#

,,3=\frac{A}{1-x}+\frac{Bx+c}{1+x^2}

soft zealotBOT
sage meteor
#

what "help" do you need exactly?

tranquil pine
#

And i got $A=B=C=\frac{3}{2}$

sage meteor
#

seems like you know what to do

soft zealotBOT
tranquil pine
#

My ans is diff from book

tranquil pine
sage meteor
#

what answer did you get? (i'm too lazy to infer)

tranquil pine
#

So am i

#

Nvm 1 min

#

,rccw

soft zealotBOT
tranquil pine
#

30th

#

I get that log terms in multiplication

#

Not in division

sage meteor
#

weird

#

there should be a ln|1-x| term

tranquil pine
#

Ye

sage meteor
#

which there is but

tranquil pine
#

Its const is 3/2

sage meteor
#

integrals give you a family of curves

tranquil pine
#

We multiply num and denom by 2

sage meteor
#

they could have different forms

tranquil pine
#

So we take 3/4 as common get that extra 2 in square of 1-x

sage meteor
#

why do you say that your answer doesn't match when you haven't solved it

tranquil pine
#

Bruh i solved bruh

#

Ok lemme recheck

sage meteor
#

what's your solution then?

#

just show a picture 💔

tranquil pine
#

Its messy and random

#

Ill do once again

sage meteor
#

okay sure

#

be sure not to miss any algebraic manipulation stuff

#

that could lead to an incorrect solution

tranquil pine
#

So is it right?

stuck juniper
#

Just do partial

tranquil pine
#

Have u read previous msgs?

stuck juniper
#

No

#

But give me a summary

tranquil pine
#

I did use pf

#

Then got 3 terms all equal to 3/2

#

Ny ans not matching with book

stuck juniper
#

Ohh

tranquil pine
#

30th

terse crypt
#

,w integrate 3/[(1-x)(1+x^2)] dx

tranquil pine
#

My work

soft zealotBOT
tranquil pine
#

Bruh

#

How do u get -2 😭

terse crypt
#

lets check the decom

tranquil pine
#

I got +2

scarlet sequoia
#

you need log|x-1| anyway

scarlet sequoia
#

if you're working in (1,infinity)

tranquil pine
#

Uhh nothing is specified like that yk

terse crypt
#

oh ic ic

scarlet sequoia
#

then 1/(1-x) = -1/(x-1)

#

which integrates into -log(x-1)

#

thus the minus sign

tranquil pine
#

But book is 1-x

#

Dude im not dat dumb

scarlet sequoia
#

so as long as you keep that square

#

you're fine

tranquil pine
#

So mines right?

scarlet sequoia
#

uhm

#

doesn't look like it

tranquil pine
#

Cuz i didnt get -ve out

#

Bruh

scarlet sequoia
#

we'll check the coeffs you got

tranquil pine
#

All are the same

#

3/2

#

Well i gotta afk

#

.close

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#
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stuck juniper
#

Uhh

#

int of 1/1-x

#

U have to multiply with -

scarlet sequoia
#

yeah

#

integral of 1/(1-x), as we said

#

is - integral of 1/(x-1)

#

which is -log|x-1|

#

so -log(1-x) if you have x < 1

stuck juniper
#

Yes

scarlet sequoia
#

check back that

#

-log(1-x) differentiates into - (-1)/(1-x) = 1/(1-x)

#

(derivative of log u = u'/u)

tranquil pine
#

.reopen

final saddleBOT
#

tranquil pine
#

K why shud i do that

#

Is it compulsory?

#

What cant integral of 1/1-x be as it is

scarlet sequoia
#

you need to come up with a function that IS the derivative of your original integrand

#

so when you tell me that 1/(1-x) integrates into log(1-x)

#

allow me to have my doubts

tranquil pine
#

Ooh ye

scarlet sequoia
#

what integration rule are you using

#

etc...

tranquil pine
#

Ye i got it noe

#

Now*

#

Ye i have one more like dis

#

,,\int \frac{\cos x}{(1-\sin x)(2-\sin x)}, dx

soft zealotBOT
tranquil pine
#

,rccw

soft zealotBOT
tranquil pine
#

I got the opposite of this

#

Like (1-sinx)/(2-sinx)

#

K y3 nvm

#

.close

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#

@vital kelp Has your question been resolved?

final saddleBOT
#

@vital kelp Has your question been resolved?

cyan kayak
#

@vital kelp I might be wrong, but if I'm recalling my group theory right, then {5^2 * 7^2, 3^2 * 5 * 7} is isomorphic to {3^2, 5, 5^2, 7, 7^2} by the Chinese Remainder Theorem, and similarly {3^2 * 5^2 * 7, 5 * 7^2} is also isomorphic to {3^2, 5, 5^2, 7, 7^2}. So 1 and 2 are isomorphic. However 1 and 3 are not, because {3, 3} is not isomorphic to {3^2}.

#

Sure, notice that 1 had a subgroup of order 9, but 3 does not.

#

They're both isomorphic to the same group {3^2, 5, 5^2, 7, 7^2}

#

by decomposition via the chinese remainder theorem

#

yes, and this is what I did

#

{5^2 * 7^2, 3^2 * 5 * 7} = Z_{5^2 * 7^2} x Z_{3^2 * 5 * 7} = Z_{5^2} x Z_{7^2} x Z_{3^2 * 5 * 7}

#

Z_{5^2} x Z_{7^2} x Z_{3^2 * 5 * 7} = Z_{5^2} x Z_{7^2} x Z_{3^2} x Z_{5} x Z_{7}

#

= {3^2, 5, 5^2, 7, 7^2}

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shrewd yew
final saddleBOT
shrewd yew
#

actually nah

#

.close

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shrewd yew
#

i just figured out what i did wrong while rereading it 😭 😭 😭

dapper hull