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Math Help - Prove a simple reduction formula (I get it almost right)

  1. #1
    s3a
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    Prove a simple reduction formula (I get it almost right)

    My answer would be correct if I didn't have that extra x variable. Why do I have it and how do I get rid of it?

    Any input would be greatly appreciated!
    Thanks in advance!
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  2. #2
    Ted
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    Quote Originally Posted by s3a View Post
    My answer would be correct if I didn't have that extra x variable. Why do I have it and how do I get rid of it?

    Any input would be greatly appreciated!
    Thanks in advance!
    Your du is wrong. It should be : du = n \left( ln(x) \right) ^{n-1} {\color{red} \frac{1}{x}} dx.

    Recall that:
    If n \in R and y=\left( f(x) \right)^n , then:
    y' = n \left( f(x) \right)^{n-1} {\color{red} f'(x)}.
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