Question

1) let y=e^2x ,
then
(d^2y/dx^2) (d^2x/dy^2) is

a) 1
b) e^-2x
c) 2 e^-2x
d) -2 e^-2x

2. Sum of first hundred numbers common to the two A.P's
12,15,18 &
17,24,25 is

a) 56100
b) 65100
c) 61500
d) none of these