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  1. #1
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    derivative

    how do you find the derivative of the following

    A = 2(pi r^2 + k/r)




    Note: k is a constant
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  2. #2
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    Quote Originally Posted by darkknight100 View Post
    how do you find the derivative of the following

    A = 2(pi r^2 + k/r)




    Note: k is a constant
    if you don't know the rules for basic derivatives, then you should not have been assigned this problem ...

    http://www.mathhelpforum.com/math-he...-question.html
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  3. #3
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    Quote Originally Posted by darkknight100 View Post
    how do you find the derivative of the following

    A = 2(pi r^2 + k/r)




    Note: k is a constant
    Use the rule that if y = ax^n then dy/dx = na x^(n-1).

    Note that \frac{2k}{r} = 2k r^{-1} ....
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