# 18 For the function y=x³-3x² - 1, use derivatives to: (a) determine the intervals of increase and decrease. (b) determine the local (relative) maxima and minima. (c) determine the intervals of concavity. (d) determine the points of inflection. (e) sketch the graph with the above information indicated on the graph.

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A: Step 1:Step 2:Step 3: Step 4:

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Q: #17

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Q: i need help please and thank you

A: Steps and explanations are as follows:In case of any doubt, please let me know. Thank you.

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A: Iteration 1 :​​Iteration 2 :​​ Iteration 3 :​​Iteration 4 :​​Iteration 5 :​​Iteration 6…

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