If `f(x+y)=f(x)f(y)` for all real x and y, `f(6)=3` and `f'(0)=10`, then f'(6) is

If f(x+y)=f(x)f(y) for all x and y, f(6)=3 and f'(0)=10, then f'(6) is :a)30 b)13 c)10 d)0

If f(x+y)=f(x)+f(y) for all real x and y, show that f(x)=xf(1) .

If f(x) a polynomial function satisfying f(x)f(y)=f(x)+f(y)+f(xy)-2 for all real x and y and f(3)=10 ,then f(4)-8 is equal

If f(x+y)=f(x).f(y) forall x,y and f(5)=2 and f'(0)=3, then show that f'(5)=6.

If f(x+y) = f(x) * f(y) for all real x and y and f(5)=2,f'(0) = 3 , find f'(5).

If f (x) a polynomial function satisfying f (x) f (y) = f (x) + f(y) + f (xy) all real x and y and f(3) = 10, then f (4) – 8 is equal to

If f(x+y) = f(x) f(y) for all x,y and if f(5) = 2 and f(0) = 3, then what is the value of f '(5)?