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IB Mathematics: Applications and Interpretation HL · 12.9: Differentiation · 12.9.11

Stationary points: where the gradient is zero Problem set A Answers

Skills

  1. a = 12

  2. a = 4.5

  3. a = 0.75

  4. a = 24

  5. x = −2 or 4

  6. x = −1.88 or 0.347 or 1.53

  7. x = 2

In context

  1. a = 2.5

  2. t = 3 and t = 7 hours

Stretch

  1. a = −9, b = 15

  2. x = 0, 1.27, 4.73

jmaths.xyz · AI HL · 12.9.11 Stationary points: where the gradient is zero