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Math Help - how to make a derivative by x..

  1. #1
    MHF Contributor
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    how to make a derivative by x..

    <br />
y'=Ae^y+Be^{-y}+2<br />
    y is a function of x
    <br />
y'=Ae^y+Be^{-y}+2<br />
    so
    <br />
 y''=Ae^yy'+Be^{-y}y'+2<br />
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by transgalactic View Post
    <br />
y'=Ae^y+Be^{-y}+2<br />
    y is a function of x
    <br />
y'=Ae^y+Be^{-y}+2<br />
    so
    <br />
y''=Ae^yy'+Be^{-y}y'+2<br />
    I don't know about anwone else but I can't see a question here, what is it you want to do?

    CB
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  3. #3
    Super Member
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    If  \frac{dy}{dx} = Ae^y + Be^{-y} + 2

    then,

     \frac{d^2y}{dx^2} = Ae^y \frac{dy}{dx} - Be^{-y} \frac{dy}{dx}
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  4. #4
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    Quote Originally Posted by CaptainBlack View Post
    I don't know about anwone else but I can't see a question here, what is it you want to do?

    CB
    I believe they have been given the 1st derivative, and have been asked to find the second?
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