Am i doing something wrong? I cant seem to spot my mistake, the answer is in red (given by my teacher).
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substitute ... now do parts
Originally Posted by skeeter substitute ... now do parts thanks! just wondering, where did i go wrong in my first answer?
Originally Posted by gomes thanks! just wondering, where did i go wrong in my first answer? does not have an elementary antiderivative ... so, it cannot be chosen as "dv"
let and
While, in differentiating something like you can just multiply by the derivative of , to get , when integrating you cannot just divide by the derivative- it must already be in the integral.
thanks everyone, very helpful! erm, could someone clarify for me: how do i know if something has an elementary antiderivative or not?
Originally Posted by gomes thanks everyone, very helpful! erm, could someone clarify for me: how do i know if something has an elementary antiderivative or not? experience http://www.math.unt.edu/integration_bee/AwfulTruth.html
Last edited by skeeter; May 30th 2010 at 02:50 PM. Reason: add link
Originally Posted by gomes How do i know if something has an elementary antiderivative or not? Differential Galois theory.
Thanks everyone!
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