Question

The value of double integal $\int\limits_0^∞\int\limits_0^xe^{-xy} ydydx$ is equal to:

• A. $\sqrt π$
• B. $2\sqrt π$
• C. $\frac{1}{2}\sqrt π$
• D. $\frac{1}{4}\sqrt π$

Answer 1

Answer: (C)

$\frac{1}{2}\sqrt π$

Answer 2

The correct option is(C)