Step 1:

The function is $\"\"$ .

Definition of derivative using limit concept

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$\"\"$ .

Step 2:

The domain of $\"\"$

The Domain of a function is all values of $\"\"$ , those makes the function mathematically correct.

Denominator of the function should not be zero.

Hence, $\"\"$

$\"\"$

The domain of function $\"\"$ is all values of $\"\"$ , except $\"\"$ .

Step 3:

The domain of $\"\"$

Denominator of the function should not be zero.

Hence, $\"\"$

$\"\"$

The domain of function $\"\"$ is all values of $\"\"$ , except $\"\"$ .

Solution:

$\"\"$ .

The domain of function $\"\"$ is all values of $\"\"$ , except $\"\"$ .