Multiple Choice Questions on The function f x 2x ndash x2 3 has ........ for NDA Exam Preparation

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Multiple Choice Questions

The function f x 2x ndash x2 3 has ........

Mathematics (NDA) Diffrentiation
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The function f(x)=2x –x2  +3 has ?

Maximum at x=1

Incorrect Answer

 Maximum at x=1 and minima at x= -5

Incorrect Answer

only  maxima at x=1

Correct Answer

only minima at x=1

Incorrect Answer
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Explanation:

f(x)=2x –x2  +3

f’(x)=2 -2x

f’(x)=0

2-2x =

X=1

F’’ (x)= -2  <0

At x=1 maxima

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