18.4 Exponents: Negative exponents
Exponents: Negative exponents
Basic concepts:
 Negative exponent rule
Related concepts:
 Power rule
Lessons
Notes:
$: {a^{1} = {1 \over a}}$${a^{x} = {1 \over a^x}}$${({a \over b})^{1} = ({b \over a})}$${({a \over b})^{x} = ({b \over a})^x}$

2.
evaluate: