$\"\"$

If an elementary function $\"\"$ is approximated by a second degree polynomial $\"\"$ centered at $\"\"$ then $\"\"$ .

If $\"\"$ then $\"\"$ and $\"\"$ .

$\"\"$

If an elementary function $\"\"$ is approximated by a second degree polynomial $\"\"$ centered at $\"\"$ then $\"\"$ .

And also $\"\"$ and $\"\"$ .