Value of 2xy when x=4 and y=0 is
0
8
16
6
2xy=2× 4× 0=8× 0=0
If f(0)=0,f′(0)=2 then the derivative of y=f(f(f(f(x))) at x = 0 is
Value of 2xy when x=4 and y=0 is _________.