Hence the exponent or power to which a base must be raised to yield a given number is nothing but the logarithm. Log a b log a c b c log a b c a c b where b 0 a 0 and a 1 log a b log a c if a 1 then b c if 0. If you think about it it will make sense.
Log 4 16 2.
In the same fashion since 10 2 100 then 2 log 10 100. Log 10 3 7 log 10 3 log 10 7 Logarithm quotient rule The logarithm of the division of x and y is the difference of logarithm of x and logarithm of y. Log a b. This is all about.