Let f(x) be continuous and differentiable function satisfying f(x+ y) = f(x) f(y) for all x, yer. if f(x) can be expressed as f(x) = 1 + x p(x)+ x*q(x) where li

Let f(x) be continuous and differentiable function satisfying f(x+ y) = f(x) f(y) for all X, yeR. If f(x) can be expressed as f(x) = 1 + x p(x)+ X*q(x) where lim p(x) = a and lim q(x) = b then X-0 X f(x) is