Question
22. A function f:R->R satisfies the following conditions: 1)f(x) not equal to zero , for all values of x corresponding to R 2)f(x+y) = f(x).f(y) , for all values of x & y corresponding to R 3)f(x) is differentiable 4)f'(0)=2 The value of f(0) is - A)1 B)-1 C)2 D)1/2