Let be a twice-differentiable function whose derivative is

MATHEMATICS · Single correct · CBSE · Mathematics · Applications of Derivatives · Applications of Derivatives

Problem

Let FF be a twice-differentiable function whose derivative is f(x)=(x−2)(x+1)f(x)=(x-2)(x+1). On which interval is FF concave down? (a) (0.5,∞)(0.5,\infty) (b) (−∞,0.5)(-\infty,0.5) (c) (−∞,0)(-\infty,0) (d) (−1,2)(-1,2)

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