help?- chain rule

Question

Answer 1

Step 1 :

The function is  .

Differentiate on each side with respect to .

.

Quotient rule of derivatives .

Solution :

.

Answer 2

Step 1 :

The function .

Differentiate on each side with respect to .

.

Derivative of logarithm function : .

Solution :

.

Answer 3

(13)

Step 1 :

The function is .

Differentiate on each side with respect to .

.

Power rule of derivatives .

Derivative of is : .

Solution :

.