$\"\"$

The integral is $\"\"$ .

Take out common term of constant.

$\"\"$

Let $\"\"$ .

$\"\"$ .

Differentiate on each side with respect to $\"\"$ .

$\"\"$

Substitute $\"\"$ and $\"\"$ in the integral.

$\"\"$

Property of integral: $\"\"$

$\"\"$

Substitute $\"\"$ in the above equation.

$\"\"$

$\"\"$ .