Evaluate: `int_1^oo(e^(x+1)+e^(3-x))^(-1)dx`

Evaluate: int_1^oo(e^(x+1)+e^(3-1))^(-1)dx

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

Evaluation of definite integrals by subsitiution and properties of its : int_(1)^(oo)(e^(x+1)+e^(3-x))^(-1)dx=..............

Evaluate: int(1)/(e^(x)+1)dx

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

Evaluate : int_(-1)^(1)e^(x)dx

Evaluate: int1/(1+e^(-x))\ dx

Evaluate: int1/(e^x+1)\ dx

Evaluate : int(1)/(e^(x)-1)dx

Evaluate : int(1)/(e^(x)-1)dx