1.

Find all possible 'b' for which f(x)=sin2x-8(b+2)cosx-(4b^(2)+16b+6)x is monotoic decreasing for xhatIRandhas nocritical point .

Answer»

`(-1,-2)`
(2,3)
`(sqrt(3)-1,OO)`
`(sqrt(3)+1,oo)`

Answer :C


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