$\"\"$

If $\"\"$ is differentiable, then $\"\"$ .

Differentiable $\"\"$ is $\"\"$ .

$\"\"$ is the change in the function along the $\"\"$ .

$\"\"$ is the change in the tangent line to the function along the $\"\"$ .

Hence the difference $\"\"$ is almost zero, if $\"\"$ tends to zero.

$\"\"$ is true.

$\"\"$

The statement is true.