int_(-oo)^( oo)(dx)/(e^(x)+e^(-x))

Evaluate int_(0)^(oo)(dx)/(e^(x)+e^(-x))

Let I_(1)=int_(0)^(oo)(f(x^(n)+x^(-n))x log x)/(1+x^(4))dx and I_(2)=int_(-oo)^( oo)(f(e^(nx)+e^(-nx))x)/(e^(2x)+e^(-2x))dx then

If int_(0)^(oo)(dx)/(e^(x)+e^(-x))=(pi)/(k) then k is equal to

If I_(1)=int_(0)^(oo)f((2)/(x)+(x)/(2))(ln x)/(x)dx,I_(2)=int_(0)^(oo)f((2)/(x)+(x)/(2))(dx)/(x) and I_(3)=int_(-oo)^( oo)xf(e^(x)+e^(x))dx then

I=int_(0)^(oo)(dx)/(1+e^(x))

int_(0)^(oo)(2)/(e^(x)+e^(-x))dx

int_(0)^(oo)[(2)/(e^(x))]dx=

int_(0)^(oo)(1)/(1+e^(x))dx=

The value of the definite integral,int_(1)^(oo)(e^(x+1)+e^(3-x))^(-1)dx is