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Let f(x)={[sqrt(n^(2)+1)]-[sqrt(n^(2)+x)...

Let `f(x)={[sqrt(n^(2)+1)]-[sqrt(n^(2)+x)]}^(1//2)`, where [.] is the greatest inger function and `n in N` then the value of x for which `f(x)` is defined

A

`sqrt(k)`, where `k=0, 1, 2........n`

B

`[-n^(2), 2n+1)`

C

`[0,2n+1)`

D

N

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The correct Answer is:
A, B, C
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