An equation of the form bx = N in
which an unknown value is included as part of the exponent
is called an exponential equation. For positive
b and A, b not equal to 1,
x = logb A; x is
called the logarithm and A is called the
argument.
common logarithm is base 10; log x means
log10x
natural logarithm is base e; ln x
means logex
In order to change from one base to another, use
logax = logbx/logba.
Exponential equations fall into one of three
types:
base
10; 10x = 5
base
e; e-0.06x =
3.456
base b (arbitrary base); 8x = 156.8