Log base a in terms of logarithm base b

Theorem

The following formula holds: $$\log_a(z)=\dfrac{\log_b(z)}{\log_b(a)},$$ where $\log_a$ denotes logarithm base a.

References

• 1964: Milton Abramowitz and Irene A. Stegun: Handbook of mathematical functions ... (previous) ... (next): $4.1.19$