74 Rational Exponents 2010 February 23, 2010
Objectives:
Convert between rational exponents and radical form.
Use rational exponents to solve real world situations.
Simplify expressions with rational exponents.
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74 Rational Exponents 2010 February 23, 2010
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74 Rational Exponents 2010 February 23, 2010
Simplify:
1. 2 4 2. (3x) 2 3. (5x 2 y) 3
4. 2
2
+ 4
1
5. (2a
2 b
3
)
4
6. (4a
3 b
1
)
2
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74 Rational Exponents 2010 x m n power root base x m n = n x m
25
= 25
1
2
3
27
4
16
= 27
1
3
= 16
1
4
February 23, 2010
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74 Rational Exponents 2010 February 23, 2010 x
3
4 = ∜ x 3
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74 Rational Exponents 2010
Write the exponential expressions in radical form.
x 3
5 y
0.4
z 1
4
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74 Rational Exponents 2010 February 23, 2010
Write the radical expressions in exponential form.
√a 3 (√ b)
2
( √y) 3
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74 Rational Exponents 2010 February 23, 2010
Space Travel
Bone loss for astronauts on lengthy space voyages may be prevented with a bedlike apparatus that rotates to simulate the effect of gravity. In the formula
N = a 0.5
2 πr
0.5
N is the rate of rotation in revolutions per second, a is the simulated acceleration in m/s 2 , and r is the radius of the apparatus in meters. How fast would an apparatus with a radius of 1.7 m have to rotate in simulate the acceleration of 9.8 m/s
2
that is due to Earth's gravity?
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74 Rational Exponents 2010 February 23, 2010
Simplifying Expressions With Rational Exponents
Simplify each expression.
125 3
1
5
1
2
.
5
1
2 10
1
3
.
100
1
3
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74 Rational Exponents 2010 February 23, 2010
All of the properties of integer exponents also apply to rational exponents.
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74 Rational Exponents 2010 February 23, 2010
Simplifying Numbers With Rational Exponents
Simplify each number.
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74 Rational Exponents 2010
Simplify each number.
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74 Rational Exponents 2010
Simplify each number.
25
3
2 32
3
5
(32)
4
5
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74 Rational Exponents 2010
Writing Expressions in Simplest Form
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74 Rational Exponents 2010
Writing Expressions in Simplest Form
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74 Rational Exponents 2010
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74 Rational Exponents 2010
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