Not sure what to do after i get down to the step i'm at, if its all correct so far.

Not sure about or after this:

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- Apr 11th 2009, 02:09 PMJim MarnellSubstitution Indefinite Integral Problem
Not sure what to do after i get down to the step i'm at, if its all correct so far.

Not sure about or after this:

- Apr 11th 2009, 02:23 PMnzmathman
You don't need substitution...

Now remember the rule ? (Wink)

But the last integral you mentioned with "u" will give you the correct answer once you integrate and substitute back. It uses the same rule I mentioned above.