Thread: Integral: have madness, need method

This looks like a tan^-1x type answer but the actual answer is different and I am not sure of the process to get there.

okay so separate it out:



then



The part with the 3 is just arctan. Use a substitution on the other part:
u = x^2 + 1 --> du = 2xdx ---> dx = du/(2x), and so the integral should give a natural log.

Originally Posted by Mentia

Whoops, that funny part is:

haha thank goodness I didn't have to try to sort out the first post lol. This is so obvious no that I see it

thank you so much for taking the time