help? find f^1(x)

Question

Answer 1

Step 1 :

The function is .

Apply derivative on each side with respect to .

Sum or difference rule of derivative :.

Power rule of derivative : .

Therefore, .

Solution :

.

Answer 2

Step 1 :

The function is .

Apply derivative on each side with respect to .

Chain rule of derivative : .

Sum or difference rule of derivative :.

Therefore, .

Solution :

.