Domain of f(x)=(x2−1)−1/2f(x) = (x^2 - 1)^{-1/2}f(x)=(x2−1)−1/2?
(−1,1)(-1, 1)(−1,1)
(−∞,−1)∪(1,∞)(-\infty, -1) \cup (1, \infty)(−∞,−1)∪(1,∞)
[1,∞)[1, \infty)[1,∞)
R\mathbb{R}R