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Question Description
find the intervals on which the function is increasind and decreasing:
-3x squared + 18X + 81
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Explanation & Answer
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(-3x^2+18x+81)'=-6x+18
function increasing--derivative>0-- -6x+18>0, -6x>-18, x<3
function decreasing--derivative<0-- -6x+18<0, -6x<-18, x>3
increasing: (-infinity, 3)
decreasing: (3, infinity)
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Sngva Zraunm
(1755)
Duke University
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