The curve has two stationary points. Find the -coordinate of the maximum point.

Answer and explanation

Correct answer: D. 16

  1. Step 1: , so the stationary points are at and . Step 2. The second derivative is negative at , so that is the maximum. Step 3. at . Answer: 16. Why not the others: -11: That is the -coordinate of the minimum point. 5: That is the -intercept, not the maximum. 11: That leaves out the constant term of .

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