Log a b. Ax ay x ax 0a 6 1 2. Like most functions you are likely to come across the exponential has an inverse function which is log e x often written ln x pronounced log x.
In the same fashion since 10 2 100 then 2 log 10 100.
Eg since 1000 10 10 10 10 3 the logarithm base. Expressed mathematically x is the logarithm of n to the base b if b x n in which case one writes x log b n. The logarithm of 8 with base 2 is 3. Where 10 is the base 2 is the logarithm ie the exponent or power and 100 is the number.