JEE Math Practice Question
Let [x] denote the greatest integer less than or equal to x. Then the domain of $ f(x) = \sec^{-1}(2[x] + 1) $ is:
- A.$(-\infty, \infty)$
- B.$(-\infty, \infty)- \{0\}$
- C.$(-\infty, -1] \cup [0, \infty)$
- D.$(-\infty, -1] \cup [1, \infty)$
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