Maths Genie - Exponentials and Logs Notation Log notation; log_a(b) is the logarithm of b to the base a Index notation; a^b is a to the power of b The following are equivalent; log_a(b) = c ≡ a^c = b Log Laws log_a(x) + log_a(y) = log_a(x.y) log_a(x) - ...