- #1
anderma8
- 35
- 0
I'm trying to integrate the following: int (x^3 + 4x)/sqrt(x^2-4) dx
I let u= x^2-4
so du/2 = xdx
granted, the above also gives me x^2=u+4 so, this gives me:
1/2 int u+8 u^-1/2 du
but the professor has:
1/2 int [u^1/2+8 u^-1/2] du
Did I miss the first u^1/2 somewhere? where did it come from?
I let u= x^2-4
so du/2 = xdx
granted, the above also gives me x^2=u+4 so, this gives me:
1/2 int u+8 u^-1/2 du
but the professor has:
1/2 int [u^1/2+8 u^-1/2] du
Did I miss the first u^1/2 somewhere? where did it come from?
