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Thread: Is this u-subs?

  1. February 11th 2009, 08:11 AM #1
    TYTY
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    Is this u-subs?

    integral of x/(x^2+1) = (ln(x^2+1))/2

    Is this solution reached by u-substitution or some property of ln?
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  2. February 11th 2009, 09:32 AM #2
    Amanda H
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    Yes this is substitution where: u = x^2 +1
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