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Consider the function f(x)=cos^(-1)([2^(...

Consider the function `f(x)=cos^(-1)([2^(x)])+sin^(-1)([2^(x)]-1)`, then
(where `[.]` represents the greatest integer part function)

A

the domain of `f(x)` is `x in(-oo, 0]`

B

the range of `f(x)` is singleton

C

`f(x)` is an even function

D

`f(x) is an odd function

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The correct Answer is:
B
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