Find the domain of (f∘g)(x)(f \circ g)(x)(f∘g)(x) where f(x)=xf(x) = \sqrt{x}f(x)=x and g(x)=x2−1g(x) = x^2 - 1g(x)=x2−1.
x≥0x \ge 0x≥0
(−∞,−1]∪[1,∞)(-\infty, -1] \cup [1, \infty)(−∞,−1]∪[1,∞)
x≥1x \ge 1x≥1
R\mathbb{R}R