For what value of the constant c is the function f continuous on (-co, co) c' + 2x +6 if x 52 f () = c . sin(2 - 2) if a > 2 x2- 4 Oc=4 O c = 14 O C 4 O c = 56 Oc=1tan (" + h) - tan (?) Evaluate the limit limp-+0 by recognizing it as a derivative of some function and using differentiation rules. h O 2 O 0 4 OWhich statement(s) is(are) true? (i) f(x) = (x| is differentiable at 0. (ii) f() = - is differentiable at (). (iii) [f (z) . g (x2)]' = f'() .9(12) +f(x) .9(22) O (ii) only O (i), (ii), and (iii) O (i) only O None of the statements are true. O (ii) only