swin2013
Which of the following values in the absolute maximum of the function f(x) = 4xx^2+6 on the interval [0.4]



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swin2013
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The answer is 10 but i keep getting 2

KeKiu
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is that 0.4? or 0 and 4?

swin2013
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0 and 4

swin2013
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0,4

FoolAroundMath
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Try differentiating f(x) and set the derivative equal to 0 to get the point of maxima.

swin2013
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f'(x) = 2x+4
x = 2, i got that

swin2013
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i mean positive 2

FoolAroundMath
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Yes, then evaluate the value of the function to get the maximum value in that interval.

swin2013
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OH i had an arithmetic problem! thank you! :)

dpaInc
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or...
since this is a parabola, you can just find the vertex...