2. 1ff) is diferentiable on (a, b) and f (a) 0 and there exists a real number k such that |f (x)|skif)| on [a, b]. then f(x) is (a) non zero, vx e [a, b] (b) ze

2. 1ff) is diferentiable on (a, b) and f (a) 0 and there exists a real number k such that |f (x)|Skif)| on [a, b]. then f(x) is (a) non zero, Vx e [a, b] (b) zero, V re [a. b] a+b (c) discontinuous at x= 2 Hd) Continuous but not differentiable, xe [a, b] e