Find the range of f(x)=log5(x2+8)f(x) = \log_5(x^2 + 8)f(x)=log5(x2+8).
All real numbers
[log5(8),∞)[\log_5(8), \infty)[log5(8),∞)
(0,∞)(0, \infty)(0,∞)
(8,∞)(8, \infty)(8,∞)