13, . . . The even and odd numbers listed are also exam-
ples of consecutive even numbers and consecutive odd
Integer and Rational Exponents
numbers because they differ by two.
Here are some helpful rules for how even and
Integer Exponents
odd numbers behave when added or multiplied:
When dealing with negative exponents, remember that
a –n = a 1
n.
even + even = even and even × even = even
odd + odd = even and odd × odd = odd
Examples:
odd + even = odd and even × odd = even
4 –2 = 4 1
2= 1 1 6
–2 –3 = – 1 2
3= – 1 8 = – 1 8
Dividing by Zero
Dividing by zero is not possible. This is important to
Rational Exponents
remember when solving for a variable in the denomi-
Recall that rational numbers are all numbers that can
nator of a fraction.
be written as fractions ( 2
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