$\"\"$

The object is dropped from acertain height is $\"\"$ .

Find the instantaneous velocity.

The instantaneous rate of change of the graph of $\"\"$ at the point $\"\"$ is the slope $\"\"$ of the tangent line at $\"\"$ given by $\"\"$ , provided the limit exists.

$\"\"$

$\"\"$ .

The instantaneous velocity is $\"\"$ .

$\"\"$

The instantaneous velocity is $\"\"$ .