88. Let f be a twice-differentiable function such that f(x) < 0 for all x. The...

 

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88. Let f be a twice-differentiable function such that f"(x) < 0 for all x. The graph of y = S(x) is the secant line passing through the points (3.f(3)) and (5,f(5)). The graph of y = T(x) is the line tangent to the graph of f at x = 4. Which of the following is true? (A) f(4.2) < S(4.2) < T(4.2) (B) f(4.2) < T(4.2) < S(4.2) (C) S(4.2) <f(4.2) < T(4.2) (D) T(4.2) < f(4.2) < S(4.2) 88. Let f be a twice-differentiable function such that f"(x) < 0 for all x. The graph of y = S(x) is the secant line passing through the points (3.f(3)) and (5,f(5)). The graph of y = T(x) is the line tangent to the graph of f at x = 4. Which of the following is true? (A) f(4.2) < S(4.2) < T(4.2) (B) f(4.2) < T(4.2) < S(4.2) (C) S(4.2) <f(4.2) < T(4.2) (D) T(4.2) < f(4.2) < S(4.2)

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f x 0 graph of fx is concave downward ie graph of fx will remain und... View the full answer