Power Rules for Exponents
If a and b are real numbers and m and n are integers, then
(a) (am)n = amn .
(b) (ab)m = ambm
(c) (a/b)m = am/bm (b ≠0).
(a) to raise a power to a power, multiply exponents;
(b) to raise a product to a power, raise each factor to that power; and
(c) to raise a quotient to a power, raise the numerator and the denominator
to that power.