#### Answer

Largest open interval over which the function is increasing: $(0, 6)$.
Largest open interval over which the function is decreasing: $(6, 8)$.

Published by
Brooks Cole

ISBN 10:
1-28505-709-0

ISBN 13:
978-1-28505-709-5

You can help us out by revising, improving and updating this answer.

Update this answerAfter you claim an answer you’ll have **24 hours** to send in a draft. An editor
will review the submission and either publish your submission or provide feedback.