$\"\"$

The function is $\"\"$ .

(a)

Graph :

Graph the function $\"\"$ using the range $\"\"$ .

$\"\"$

(b)

The function is $\"\"$ .

$\"\"$

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

$\"\"$

Apply formula: $\"\"$ .

$\"\"$

Apply Pythagorean identity : $\"\"$ .

$\"\"$

Substitute $\"\"$ .

$\"\"$ .

$\"\"$

(a)

Graph of the function $\"\"$ on range $\"\"$ .

$\"\"$

(b) $\"\"$ .