Posted by Jules on Tuesday, April 26, 2011 at 1:12pm.
Could someone answer this question so I understand it. Thanks
Find the indefinite integral.
x/ã3x^2+4 dx =
Simplify the answer. Use C as the arbitrary constant.

Math  MathMate, Tuesday, April 26, 2011 at 2:22pm
Required:
I=∫xdx/√(x²+4)
Try u=x²+4, du=2xdx, xdx = du/2
I=∫ (1/2)du/√(u)
Use the power rule for u^(1/2)
I=u^(1/2)+C
=√(x²+4) + C