1. Use definition of zero and negative exponents
EXAMPLE 1
Use definition of zero and negative exponents 1 32 =
a. 3– 2
Definition of negative exponents 1 9 =
Evaluate exponent.
b. (–7)0
= 1
Definition of zero exponent

2. Use definition of zero and negative exponents
EXAMPLE 1
Use definition of zero and negative exponents 5 –2 1 c. = 1 5 2
Definition of negative exponents 1 25 =
Evaluate exponent.
= 25
Simplify by multiplying numerator
and denominator by 25. 1
0 5
(Undefined) =
d – 5
a – n is defined only for a nonzero
number a.

3. GUIDED PRACTICE
for Example 1
Evaluate the expression. 2 3 1. 1 2 3. –3 = 1
= 8
2. (–8) – 2 1 64 =
4. (–1 )0
= 1