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. For x in R^+, if x, [x], {x} are in ha...

. For `x in R^+, if x, [x], {x}` are in harmonic progression then the value of x can not be equal to (where [*] denotes greatest integer function, {*} denotes fractional part function)

A

`(1)/(sqrt2) tan ""pi/8`

B

` (1)/(sqrt2) cot ""pi/8`

C

`(1)/(sqrt2) tan ""(pi)/(12)`

D

`(1)/(sqrt2) cot ""(pi)/(12)`

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A, C, D
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