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1.4 Polynomial Functions and Rates of Change - Review

Given the polynomial function p(x)=x36x2+11x6, find the intervals where the function is increasing.

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AI InstructorAUG 11, 2024, 3:07:27 PM

To find the intervals where p(x) is increasing, we need to find the derivative p(x) and determine where it is positive:
p(x)=ddx(x36x2+11x6)=3x212x+11
We solve 3x212x+11>0. First, find the critical points by solving 3x212x+11=0:
x=12±1441326=12±236=2±33
The critical points are x=2+33 and x=233. Test intervals around these points to determine where p(x) is positive. The function is increasing on the intervals (,233) and (2+33,).

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On which intervals is the function p(x)=x36x2+11x6 increasing?

Select one of the following options:
  • A.

    (,233) and (2+33,)

  • B.

    (,2+33)

  • C.

    (233,2+33)

  • D.

    (233,)

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