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Q.

The function f(x)=sec−1⁡xx−[x], where [⋅] denotes the greatest  integer less than or equal to x is defined for all x belonging to

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a

R

b

R−{(−1,1)∪(n∣n∈Z)}

c

R+−(0,1)

d

R+−{n∣n∈N}

answer is B.

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Detailed Solution

The function sec-1 x is defined for all x∈R --1,1 and the function 1x-x is defined for all x∈R -Z    we know that x⩾ x  and x =x for x∈Ztherefore domain of the given function =R --1,1∪n/n∈Z
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