Question: answer both questions Thinking [14 marks] 19. Use the first or second derivative test (or both) to find the local maximum or minimum points of
answer both questions
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Thinking [14 marks] 19. Use the first or second derivative test (or both) to find the local maximum or minimum points of f(x) = x* - 8x3 + 18x2 [4 marks] the workmay 20. Determine the points of inflection of f (x) = 243 [4 marks]
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