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

Evaluate :int_(0)^(oo)e^(-x)dx

Evaluate the following definite integrals: int_(0)^(oo)e^(-x)dx

underset is If int_(0)^(oo)e^(-ax)dx=(1)/(a), then int_(0)^(oo)(x^(n))e^(-ax)dx

The value of int_(0)^(oo) e^(-3x) x^(2) dx is

Evaluate int_(0)^(oo)[2e^(-x)]dx

Evaluate: int_(0)^(oo)[2e^(-x)]dx, where [x] represents greatest integer function.

The value of int_(0)^(oo)[2e^(-x)]dx (where,[^(*)] denotes the greatest integer function of (x) is equal to