Find the Intervals of Increase and Decrease For $f ( x ) = 6 x ^ { 3 } + 9 x ^ { 2 } - 108 x - 3$

question 13

Multiple Choice

Find the intervals of increase and decrease for $f ( x ) = 6 x ^ { 3 } + 9 x ^ { 2 } - 108 x - 3$ .

• A)Increasing on x < -3 and x > 2,decreasing on -3 < x < 2
• B)Increasing on -3 < x < 2,decreasing on x < -3 and x > 2
• C)Increasing on x < -2,decreasing on x > 3
• D)Increasing on x \(\leq\) -2 and x \(\geq\) 3 ,decreasing on - 2 \(\leq\) x \(\leq\) 3

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