use definition of zero and negative exponents
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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. 0 – 5 a – n is defined only for a nonzero number a.
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Use definition of zero and negative exponents
EXAMPLE 1
a. 3– 2 Definition of negative exponents
1 9
= Evaluate exponent.
b. (–7)0 Definition of zero exponent
132
=
= 1
Use definition of zero and negative exponents
EXAMPLE 1
= 25 Simplify by multiplying numerator and denominator by 25.
d. 0 – 5 a – n is defined only for a nonzero number a.
10 5 (Undefined)=
=15
1 25
–21c. Definition of negative exponents
125
1=
Evaluate exponent.
GUIDED PRACTICE for Example 1
Evaluate the expression.
023
1. = 1
1 64
=2. (–8) – 2
12
3.–3
= 8
4. (–1 )0 = 1
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