A logarithm is another way to write an exponent.
Example
If we had the exponent 43 = 64 we could write
it as a logarithm as follows:
43 = 64 is the same as log4
64 = 3
Verbally we would say the logarithm of 64 to the base 4 is
three. The basic format for a logarithmic function is as
follows:
Where b is the base of the logarithm. There are two common
bases used in mathematics the first is base 10 and the second is e
(called the natural log).
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