Lesson 5-7 Rational Exponents
Definition of b 1/n :
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Evaluate each expression:
1)
4)
−
81
64
1
4
2)
1
3
32
5)
1
5
3)
49
1
−
2
36
1
2
1
 
8
6)
−
1
3
m
Definition of Rational Exponents b n __________________________
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Simplify each expression:
2
7)
9)
5
x3 ⋅ x3
1
3
1
2
4 • a •b
8)
5
6
y
−
5
6
10)
1
2
3
4
x •x •x
1
5
An expression is simplified when:
1) ________________________________________________________
2) ________________________________________________________
3) ________________________________________________________
4) ________________________________________________________
Simplify each expression.
8 16
12) 4 4 x 2
11)
6 2
1
2
a +1
1
2
a −1
14)
8
17)
81
6
3
13)
6 25x 4
10
15)
32
8
4
18. 4 9z 2
16)
a
(a + b )
1
2
1
2