Where [.] denotes the greatest integer function respectively – (A) [ 1, ∞), [0, π/2]

Question

The domain and range of f(x) = cos^–1 √log_[x] (|x|/x).

Where [.] denotes the greatest integer function respectively – 

(A) [ 1, ∞), [0, π/2]

(B) [2, ∞), [0,π/2]

(C) [2, ∞), {π/2}

(D) [1, ∞), {0} 

Answer 1

Correct option (C) [2, ∞), {π/2}

Explanation: