What is the range of f(x)=log2(x)f(x) = \log_2(x)f(x)=log2(x)?
[0,∞)[0, \infty)[0,∞)
(0,∞)(0, \infty)(0,∞)
[1,∞)[1, \infty)[1,∞)
(−∞,∞)(-\infty, \infty)(−∞,∞)