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Mathematics 7 Online
OpenStudy (anonymous):

HIGH SCHOOL DIFFERENTIAL EQUATIONS: http://gyazo.com/74ab054a4598bd38974685146682659e.png @jim_thompson5910 @phi @myininaya @Luigi0210 @timo86m @whpalmer4 @eliassaab @Euler271 @kc_kennylau @ehuman @isai @Rina.r @iheartfood @Study23 @Mr.ClayLordMath @lopezking1 @mathmale @Kristen17 @Emily778 @Skyz @Sonyalee77 @FLVSenglishstudent @Yolo4mecuite @secret66 @dariyana @androidonyourface @TammisaurusRex @kawaiicat123 @elephantine @NaomiBell1997 @TheSecretsToday @OtonoGold @Taylor<3sRin @Figureskater120 @Schrodingers_Cat @Senka™ @Objection @MDoodler @LovelyAnna @G-unit @sleepyjess @Microrobot @arilov

OpenStudy (kc_kennylau):

Please do not mass tag.

OpenStudy (kc_kennylau):

You won't understand the feeling of falling from heaven to hell xD

OpenStudy (anonymous):

Do you know how I can start this problem? This teacher is insane.

OpenStudy (kc_kennylau):

You can start by this: \[\begin{array}{rcl} \frac{dy}{dt}&=&t\sqrt y\\ dy&=&t\sqrt ydt\\ \frac1{\sqrt y}dy&=&t\hspace{3pt}dt\\ \int\frac1{\sqrt y}dy&=&\int t\hspace{3pt}dt\\ \end{array}\]

OpenStudy (anonymous):

y = (t^2/2+c)^2

OpenStudy (kc_kennylau):

How the hell did \(\int\dfrac1{\sqrt y}dy\) become \(y\)? lol

OpenStudy (anonymous):

I integrated it to get 2sqrt(y) then brought the 2 over to the other side then squared it

OpenStudy (kc_kennylau):

oh sorry lol

OpenStudy (kc_kennylau):

I doubt that it's 2t^2 instead of t^2/2

OpenStudy (anonymous):

What do you mean? Might want to check your math lol

OpenStudy (kc_kennylau):

oh yes sorry my fault

OpenStudy (anonymous):

Oh wait! Is it (t^2/4+c)^2?

OpenStudy (kc_kennylau):

oh yes lol, so now you're better than me :)

OpenStudy (anonymous):

Ok, continue on

OpenStudy (kc_kennylau):

I don't know how to do xP I'm only grade 9 xP

OpenStudy (mathmale):

Kenny did a great job of putting this problem into appropriate math symbols. I'll start from there. \[\int\limits_{-}^{-}\frac{ dy }{ \sqrt{y} }=\int\limits_{-}^{-}y ^{-1/2}dy\]

OpenStudy (mathmale):

Integrating this requires the power rule. Are you, Aunt Anna, familiar with that? If so, would you try doing the integration yourself?

OpenStudy (anonymous):

I said by doing separation of fariables you would get y = (t^2/4+c)^2

OpenStudy (anonymous):

@TanteAnne, you are right the answer is \[ y=\left(c+\frac{t^2}{4}\right)^2 \]

OpenStudy (anonymous):

Continue

OpenStudy (anonymous):

Continue

OpenStudy (mathmale):

There's nothing to continue, Anna. eliassaab's result is in simplest form.

OpenStudy (anonymous):

tHERE ARE STILL 4 MORE PARTS.

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