Post on 01-Jan-2016
description
Warm-upSession 17
Simplify each expression completely.
83
92
34
336
x.4
48 .3
45 .2
.1
xx
aab
xx
yx
918 yx7000,40 x
211256 ba12x
Daily Quiz
Write each expression as a single power of the
base.1. 73 76
2. (y4)3
Simplify each expression.3. (2y)4
4. (3b3)2 b
Turn this in.
Take out your homework.
7.2 Zero & Negative Exponents
Use your calculator to evaluate.
1. 50
2. (-2)0
3. (.45)0
4. (1/7)0
5. (1239)0
6. 00
What can you
conclude?A nonzero number to the zero
power equals one.
Negative exponents
move terms to the other part of the fraction.
Negative exponents move terms to the other part of the fraction. (reciprocal)
Example 1: Evaluate
x
y24
x
y24
4 is downstairs.We will move it…
x
y16
Example 2
4
3
x
1
3 4x 43x
x is downstairs.We will move it…
Example 3
29
29
1
81
1-9 is upstairs.
We will move it…
Now let’s include what we learned from last class.
33 44 334 04 1
423 83 6561
What do we know that we can do with these exponents?
What do we know that we can do with these exponents?
225 210 2)10(
1
100
1
Evaluate the expression without using a calculator.
2
21
32
43 .6
3 .5
44 .4
-
4
1
9
144
1
Rewrite the expression with positive exponents.
3
2
33
5 .9
3 .8
2 .7
b
x
yx3
32
x
y
23x
3125
1
b
Class work:SPW 65What do you call it when a plane comes down in a garbage heap?
• Turn this in on the cart when you are finished
• Make sure your name is on it
Work
p. 452 21 – 39 by 3s
and 51 – 62 all