When a power is raised to another , the powers can be combined into one by multiplying them. For example
can be rewritten with this rule as follows.
This rule can be explained by writing the powers as products.
This rule is valid for all values of
For the rule to be true also for
it is necessary that both exponents are greater than
Note that the rule might lead to non-real solutions when
and at least one of the exponents is not an integer.