DE

a

c

Look at book for soln

Derive range from drawing the graph of f(x) from 0 to pi/2

ans is a

Ans is c

open the bracket and differentiate twice

Just substitute y=z^a directly into the equation

ans is a

Diff both sides and then solve linear DE

10.b

1. c

d

a

a

d

1 a

2 d

3 c

7.b

8.b

9.a