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Determine the point of maxima and minima...

Determine the point of maxima and minima of the function `f(x)=1/8(log)_e x-b x+x^2,x >0,` where `bgeq0` is constant.

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The correct Answer is:
`"Mamima at x"=(b-sqrt(b^(2)-1))/(4)" & minima at x"=1/4 (b+sqrt(b^(2)-1))`
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