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The domain of function f(x) = sec-1x/ (x-[x] where [ . ] is greatest integer function.

(A*) R – {(–1, 1) ⋃ (n, n ∈ )} 

(B) R – (–1, 1) 

(C) R+ – (0, 1) 

(D) R – (n, n ∈ I)

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For sec–1x be defined x  1 and x  –1 .........(i)

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