$\"\"$

The function is $\"\"$ .

Second Fundamental Theorem of Calculus:

If $\"\"$ is continuous on an open interval $\"\"$ containing $\"\"$ , then for every $\"\"$ in the interval $\"\"$ .

$\"\"$

Apply derivative on each side with respect to $\"\"$ .

$\"\"$

Apply Second Fundamental Theorem of Calculus, then $\"\"$ . $\"\"$ .

$\"\"$

$\"\"$ .