What is the domain of f(x)=14−xf(x) = \frac{1}{\sqrt{4 - x}}f(x)=4−x1?
(−∞,4)(-\infty, 4)(−∞,4)
(−∞,4](-\infty, 4](−∞,4]
[4,∞)[4, \infty)[4,∞)
(4,∞)(4, \infty)(4,∞)