No need for partial fractions.
Let
I have this problem (forgive me, i haven't gotten the math controls down yet):
Integral 7x/(1+3x^2)^2 dx
here's what I've done so far:
A/(1+3x^2) + B/(1+3x^2)^2
= A(1+3x^2)+B(1+3x^2)/ (1+3x^2)^2
= A(1+3x^2)+B
I'm stuck right there. I can't figure out how to solve for A and B. Any help is greatly appreciated.
Cheers
If you want to calculate it by partial fractions :
You're looking for A, B, C and D such that :
, which is, I think you agree with it, quite complicated
You can look at this link : Quick Guide Partial Fractions