Determine which of the following conditions is NOT NECESSARY in order for a function y = f(x) to be differentiable at x=a. Circle all conditions which are not necessary. f(x)-f(a)_ (A) lim f(x)-f(a) exists (B) lim f(x) = f(a) (C) lim = f(a) x→a x-a X-+0 x-a x-a (D) lim (x)-f(a) (E) lim f(a+h)-f(a) h X-40 x-a h→0 - lim f(x) X-40 f(a+h)-f(a) h lim h→0