Asked by Anonymous

3x^2 and 3x^3 are both increasing and positive for x>0. How many times greater is the rate of increase of 3x^3 than the rate of increase of 3x^2 at x=4?

Answers

Answered by Reiny
y1 = 3x^2 and y2 = 3x^3

at x=4
dy1/dx = 6x or 24
dy2/dx = 9x^2 = 144

so how many times greater ?
Answered by Bekah
144/24 = 6
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