posted by Heather .
Evalute the integral of x/(x^2+4)dx using u-substitution and then trigonometric substitution. I did this and got (1/2)ln(x^2+4)+C using u-substitution and x^2+4+C using trigonometric substitution. What did I do wrong??? thank you for helping!
The answer is clearly
(1/2) ln(x^2 + 4) + C
you can check by taking the derivative
I don't know how you got the other answer, but it is definitely incorrect