To determine the range of the function , let's analyze the expression.
The expression inside the logarithm, ,
is always greater than or equal to 0 for all real values of , and it is
equal to 0 only when .
Since logarithms are only defined for
positive arguments, is defined for all , and the
argument is positive for all .
Thus, for all , and
we can compute for all .
Find the behavior of
The expression behaves
similarly to where . Since can take any positive
value, the logarithmic function can take any real value.
As ,