Thread: Intergration....

Intergrate....

1. x + 2x^3 divided by (x^4 + x^2)^3 dx

and

2. sin^2 u divided by 1 + cos u du

please help....

Originally Posted by sweetchocolat113

Intergrate....

1. x + 2x^3 divided by (x^4 + x^2)^3 dx

and

2. sin^2 u divided by 1 + cos u du

please help....

for the first let

for number 2)

multiply by the conjugate of the denominator