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December 21, 2014

December 21, 2014

Posted by **jordan** on Tuesday, December 1, 2009 at 4:15pm.

a) when will Unlicky's buisness show the maximum of profit?

b)what is the maximum profit?

c)at what time will it be too late to sell his business?(when will he start losing money?)

- math -
**MathMate**, Tuesday, December 1, 2009 at 5:17pmGiven:

f(x)=-3x^2+18x-4

a)

Find f'(x) and equate to zero.

solve for x=xm.

Since the leading coefficient is -3, the extremum is a maximum.

b) maximum profit=f(xm)

c) He starts losing money when f(x)=0, AND f'(x)<0. There are two roots to f(x)=0, make sure the correct one is chosen.

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