$\"\"$

The function is $\"\"$ .

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

$\"\"$ .

Sum and difference rule of differentiation : $\"\"$ .

$\"\"$

Power rule of differentiation : $\"\"$ .

$\"\"$

$\"\"$ .

$\"\"$

Graph :

(a) Graph the function $\"\"$ in the viewing rectangle $\"\"$ and $\"\"$ .

$\"\"$

The pattern of derivative field is matched with the graph of the derivative function.

Hence the result is verified.

$\"\"$

$\"\"$ .