# Functions : Concave Up and Concave Down

6. (6--9) Determine the intervals on which the function is concave up and intervals on which the function is concave down. Check your answers by graphing the corresponding functions.

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7. .

8. restricted to .

9.

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#### Solution Summary

Concave-up and concave-down functions are investigated. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.

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