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function above x-axis?

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function above x-axis?

by katy1988 » Sat Mar 03, 2018 9:20 am
hi
Could someone please explain this to me as i have been stuck on how to anwser this for over 2 weeks now
Explain why the graph of f(x)=-(x+1)sin(5x) lies on or above the x-axis for all values of x in the interval [7pi/5, 8pi/5]
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by Brent@GMATPrepNow » Sun Mar 04, 2018 12:06 pm
katy1988 wrote:hi
Could someone please explain this to me as i have been stuck on how to anwser this for over 2 weeks now
Explain why the graph of f(x)=-(x+1)sin(5x) lies on or above the x-axis for all values of x in the interval [7pi/5, 8pi/5]
This is way beyond the scope of the GMAT.

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