Recent content by chubb rock

Yeah, that is what I meant and both make so much more sense to me now. Thanks!

Back for a couple more I'm having a little trouble with. The first is sech(1/x)tanh(1/x) all over x^2 Here I'm not sure how to deal with integrating hyperbolics at all as we haven't gotten to it in class yet. I did some searching on the internet and found that the integral tanh(x)sech(x) =...

Oh, yeah. Typo. That's what I meant. Awesome, thanks for the help.

Does that mean I can substitute just the variable and leave the "+ 1"? That is substitute u as w^2 getting u^2 = u^4?

I'm supposed to integrate w/w^4 + 1 The two ideas I'd come up with was trying to substitute w^4+1 with u but that results in a 0 in the numerator. Then I thought maybe I have to put w/w^4+1 into the 1/1+w^2 form and integrate into 1/k tan^-1kx + C but I'm not sure how to keep the original...