Which of the following are accurate descriptions of the second derivative of f (x)? Choose ALL that apply. O The sign of the second derivative indicates the concavity of f (x). lim f(z+h)-f(z) f" (x) h O The second derivative tells the instantaneous rate of change of the instantaneous rate of change of f (x). O The sign of the second derivative indicates whether f(x) is increasing or decreasing.

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