Answer :


Differentiating f(x) with respect to x, we get



Also, differentiating f’(x) with respect to x, we get



For maxima at x=c, f’(c)=0 and f’’(c)<0


or (Since x>0)


f’’(1)=2>0


Since f’’(1)>0 therefore x=1 is not a point of maxima and hence no maximum value of f(x) exists for x>0.

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