$\"\"$

\

The function is $\"\"$ and $\"\"$ and $\"\"$ .

\

Find $\"\"$ at $\"\"$ and $\"\"$ .

\

$\"\"$ .

\

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

\

$\"\"$ .

\

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

\

$\"\"$

\

The differentiate function is $\"\"$ .

\

Substitute $\"\"$ and $\"\"$ in the differentiate function.

\

$\"\"$

\

$\"\"$

\

Find $\"\"$ at $\"\"$ and $\"\"$ :

\

If $\"\"$ changes by a small amount $\"\"$ this will cause $\"\"$ to change by a small amount $\"\"$ .

\

Substitute $\"\"$ and $\"\"$ in $\"\"$ function.

\

$\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

$\"\"$

\

The value of $\"\"$ is $\"\"$ .

\

The value of $\"\"$ is $\"\"$ .