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Math Help - Second derivative question

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    tim
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    Second derivative question

    I need to find the second derivative of this fuction: F(x)= sqrt(x^4 + 4x). I found the first derivative no problem which is: f'(x)= (2x^3 + 2)/ sqrt(x^4 + 4x). But I am having trouble with the second derivative, can someone show me? Thanks!
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    Quote Originally Posted by tim View Post
    I need to find the second derivative of this fuction: F(x)= sqrt(x^4 + 4x). I found the first derivative no problem which is: f'(x)= (2x^3 + 2)/ sqrt(x^4 + 4x). But I am having trouble with the second derivative, can someone show me? Thanks!
     <br />
F''(x) = \frac{6x^2 \sqrt{x^4 + 4x}- \dfrac{(2x^3+2)^2}{\sqrt{x^4+4x}}}{x^4 + 4x}<br />
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