If y = x|x|, find for x < 0.

10

If write the value of for x > 1.

11

If f(0) = f(1) = 0, f’(1) = 2 and y = f(e^x) e^f(x), write the value of at x = 0.

13

If y = sin^–1 x + cos^–1 x, find .

14

If x = a(θ + sin θ), y = a (1 + cos θ), find .