$\"\"$

The expression is $\"\"$ .

Substitute $\"\"$ in the expression.

$\"\"$

$\"\"$ .

$\"\"$

Prove the limit L using $\"\"$ definition.

To show that for each $\"\"$ ,there exists a $\"\"$ such that $\"\"$

whenever $\"\"$ .

Consider $\"\"$

$\"\"$

Consider $\"\"$

$\"\"$

Observe we relationship between the two absolute values $\"\"$ and $\"\"$ .

$\"\"$ . \ \

$\"\"$

$\"\"$ .