`int_1^2 (1-x)/(1+x) dx`

(i) int_1^2 (dx)/((x+1)(x+2)) (ii) int_1^2 (x+3)/(x(x+2) dx

int_1^2 x/((x+1)(x+2))dx

Evaluate: int_(1)^(2)(1)/((x+1)(x+2))dx( ii) int_(1)^(2)(1)/(x(1+x^(2)))dx

Evaluate int_(1)^(2)(1)/(x(x+1))dx

int_1^2 1/(x(x^4+1))dx =

int_(1)^(2)(1)/(x sqrt(x^(2)-1))dx=

Evaluate the following integral: int_0^1(1-x^2)/((1+x^2)^2)dx

The value of (^nC_(0))/(n)+(^nC_(1))/(n+1)+(^nC_(2))/(n+2)+....+(n)/(2n) is equal to a.int_(0)^(1)x^(n-1)(1-x)^(n)dxbint_(1)^(2)x^(n)(x-1)^(n-1)dxc*int_(1)^(2)x^(n-1)(1+x)^(n)dx d.int_(0)^(1)(1-x)^(n-1)dx