mikaylabullard5594 mikaylabullard5594 14-03-2024 Mathematics contestada Let f(x) = √(x2 + 5) . Then f'(x) is (x/√(x2 + 5) ) , if f''(x) is ___ and f''(4) is ___. a) f''(x) = -5/(x2 + 5) (3/2) ; f''(4) = -5/√(21) b) f''(x) = 5/(x2 + 5) (3/2) ; f''(4) = 5/√(21) c) f''(x) = -5/(x2 + 5) (3/2) ; f''(4) = 5/√(21) d) f''(x) = 5/(x2 + 5) (3/2) ; f''(4) = -5/√(21)