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Math Help - Chain Rule Question

  1. #1
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    Chain Rule Question

    I have to find the derivative of x(x^2+1)^(1/2)
    The problem is, I thought the chain rule was deriv. of outside (leave inside alone) multiplied by the deriv. of the inside.
    So, I had

    1/2 x(x^2+1)^(-1/2) * (2x)

    yet when I test it in my calculator, it is wrong, what am I missing?
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by BCHurricane89 View Post
    I have to find the derivative of x(x^2+1)^(1/2)
    The problem is, I thought the chain rule was deriv. of outside (leave inside alone) multiplied by the deriv. of the inside.
    So, I had

    1/2 x(x^2+1)^(-1/2) * (2x)

    yet when I test it in my calculator, it is wrong, what am I missing?
    what about the x that you have in front of the (x^2 + 1)^{1/2}?? you have a product of functions, you must use the product rule
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  3. #3
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    ahh ok, thanks

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