Question: Thinking ( 1 8 marks ) 1 9 . Determine the intervals of concavity and the points of inflection for the following function: ( 8

Thinking (18 marks)
19. Determine the intervals of concavity and the points of inflection for the following function: (8 marks)
f(x)=x4+4x3-18x2+12x-12
Thinking ( 1 8 marks ) 1 9 . Determine the

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