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Math Help - What is the double derivative(y") of x^2+y^2=25

  1. #1
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    What is the double derivative(y") of x^2+y^2=25

    What is the double derivative(y") of x^2+y^2=25

    Thank you!
    Last edited by mr fantastic; January 24th 2010 at 04:36 PM. Reason: Copied title of post into main body.
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  2. #2
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    dy/dx of x^2 + y^2 = 25 is gonna be 2x + 2y(dy/dx)=0

    Simply take the second derivitive of that to find your answer.

    This is assuming that y is your dependent variable mind you, if y is the independent then you will be finding dx/dy and it will be 2x(dy/dx) + 2y=0
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    Thank you!
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