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If f(x)=alog|x|+b x^2+x has its extremum...

If `f(x)=alog|x|+b x^2+x` has its extremum values at `x=-1a n dx=2,` then `a=2,b=-1` `a=2,b=-1//2` `a=-2,b=1//2` (d) none of these

A

a=2, b=-1

B

a=2 , `b=-(1)/(2)`

C

`a=-2 , b=(1)/(2) `

D

`a=(1)/(2),b=-(1)/(2)`

Text Solution

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The correct Answer is:
B
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