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If x=-1 and x=2 are extreme points of f(...

If `x=-1` and x=2 are extreme points of `f(x)=alphalog|x|+beta|x|^2+x` then :

A

`alpha=2,beta=-1/2`

B

`alpha=2,beta=1/2`

C

`alpha=-6,beta=1/2`

D

`alpha=-6,beta=-1/2`

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