You are asking:
Are there any cases where when A and B are
different numbers?
The first one that comes to mind is
because both sides equal 16.
Another case (using fractions) is
We prove that by proving that their logs are equal:
log of the left side
log of the right side
So
because the log of the left side equals the log of the right side.
Other solutions are:
You can generalize this to:
and
then
This can be proved the same way, by showing that the logs of the
left and right sides are equal.
In fact the first solution mentioned above
is the case of this when n=1
Edwin