anonymous
  • anonymous
http://www.webassign.net/scalcet7/4-3-006.gif (a) On what intervals is f increasing? (Enter your answer using interval notation.) b)On what intervals is f decreasing? (Enter your answer using interval notation.) For a i have (2,4) and for be I have (0,2)U(4,6) i just want to make sure its right
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
the graph is for f'(x). f(x) increases when f'(x) is positive and decreases when it's negative.
anonymous
  • anonymous
are my answers correct?
anonymous
  • anonymous
no. you gave intervals where the derivative increases/decreases

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anonymous
  • anonymous
do you understand why your answer is wrong and how to get the correct intervals?
anonymous
  • anonymous
I understand why its wrong, but Im not sure how to get the right intervals
anonymous
  • anonymous
f will increase on intervals where the graph is positive and decrease where the graph is negative.
anonymous
  • anonymous
For example the graph is positive from 0 to 1, so f increases on the interval [0, 1).
anonymous
  • anonymous
oh okay i think i understand, um so for a it would be (3,5)?
anonymous
  • anonymous
and (0,1)
anonymous
  • anonymous
yes
anonymous
  • anonymous
and for b it would be (1,3) and (5,6)
anonymous
  • anonymous
At what values of x does f have a local maximum or minimum? (Enter your answers as a comma-separated list.) Im not really sure how to solve for this part
anonymous
  • anonymous
yes, although I think you should use brackets [] for the 0 and 6 because of the closed circles.
anonymous
  • anonymous
local maximums and minimums are where the derivative is 0, so pick out the x-intercepts of your graph
anonymous
  • anonymous
okay so it would be 1,3 and 5?
anonymous
  • anonymous
yes
anonymous
  • anonymous
Thank you!!
anonymous
  • anonymous
you're welcome

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