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Find all possible 'b' for which `f(x)=sin2x-8(b+2)cosx-(4b^(2)+16b+6)x is monotoic decreasing for `xhatIRand`has no critical point .

A

`(-1,-2)`

B

(2,3)

C

`(sqrt(3)-1,oo)`

D

`(sqrt(3)+1,oo)`

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The correct Answer is:
C
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