1.

The value of a for which the functionf(x)=(4a-3)(x+log5)+2(a-7)"cot"(x)/(2)"sin"^(2)(x)/(2) does not possess critical points is

Answer»

`(-OO,-4//3)`
`(-oo,-1)`
`[1,oo)`
`(2,oo)`

ANSWER :A::D


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