" (A) "int_(1)^(2)(dx)/(x(1+x^(2)))

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

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

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

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

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

int((x^(2)+1)dx)/(x(x^(2)-1))

Let I_(1)=int_(1)^(2)(x)/(sqrt(1+x^(2)))dx and I_(2)=int_(1)^(2)(1)/(x)dx .Then

int_(1)^(e^(2))(dx)/(x(1+log x)^(2))=

Show that (a) int_(e)^(e^(2))(1)/(log x)dx = int_(1)^(2)(e^(x))/(x)dx (b) int_(t)^(1)(dx)/(1+x^(2)) = int_(1)^(1//t)(dx)/(1+x^(2))

Let I_(1)=int_(1)^(2)(1)/(sqrt(1+x^(2)))dx and I_(2)=int_(1)^(2)(1)/(x)dx .Then