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

Answer and explanation

Correct answer: D. 22

  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: 22. Why not the others: -103: That is the -coordinate of the minimum point. 5: That is the -intercept, not the maximum. 17: That leaves out the constant term of .

Practise more Differentiation and Applications.

Free questions with an explanation for every one, and full timed Singapore GCE O-Level mock tests.