Let f be a twice differentiable function on (1, 6). If f(2) = 8, f’(2) = 5, f’(x) $ \ge $ 1 and f''(x) $ \ge $ 4, for all x $ \in $ (1, 6), then :

Question

f(5) $ \le $ 10

f(5) + f'(5) $ \ge $ 28

f(5) + f'(5) $ \le $ 26

f'(5) + f''(5) $ \le $ 20

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