# Trigonometry

What is the upper and lower limit of F(x)=3x^2+6x^2-2x-2?

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1. Hmmm. With 9x^2 in it, the upper limit is infinity, if the domain of x is all real numbers.

Now lower limit:
f'=18x-2=0
x=1/9 or F(lower)=9/81-2/9-2=-2 1/9

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