Exponent Combination Laws/Power of Quotient

Theorem
Let $a, b \in \R_+$ be positive real numbers.

Let $x \in \R$ be a real number.

Let $a^x$ be defined as $a$ to the power of $x$.

Then:
 * $\left({\dfrac a b}\right)^x = \dfrac{a^x}{b^x}$