Step 1 :

5)

The limit is .

Put  in the above limit.

.

Given limit is at undefined condition.So apply L-Hospitals rule :

Use the power rule property of derivative:

Use the constant rule property of derivative:

Evaluate the limits,

Step 2:

6)

The limit is .

Put  in the above limit.

Given limit is at undefined condition.So apply L-Hospitals rule :

Solution :

5)

6)