5 Radical and Inverse Functions - Loudoun County Public Schools
[Pages:4]NOTES: RADICAL AND INVERSE FUNCTIONS
Textbook Chapter 6.4
DAY 5
OBJECTIVE:
Today you will learn about inverse functions!
Graph both functions. What is their relationship?
1. f(x) = x2,
g(x) = x
2.
f(x) = 2x2 ? 3
g(x) = 1 2
x +3
3. y = x - 1 + 4
4. y = 2 x + 5
Find the Vertex Practice: (all types)
5. y = x - 4 + 8 Vertex: ( , )
6. y = - x
Vertex: ( , )
7. y = - x - 1 Vertex: ( , )
8. y = x - 7 Vertex: ( , )
( ) 9. y = 1 x + 10 2 Vertex: ( , ) 3
10. y = 3 x + 1 Vertex: ( , )
Find the inverse function. 1. y = 3x ? 3
2. f(x) = x2
3.
y = - 4 x + 11
5
4. f(x) = 1 x 3 - 2 2
Verify that the functions are inverses: f(x) = 4x2 + 8
g(x)
=
1 4
x -8
Graphing the Radical Functions
1) y = 2 x
Chart
Initial Point: ( , ) 2)
y
=
1 3
x
Chart
DAY 5
Initial Point: ( , )
3) y = -2 x - 3 Initial Point: ( , ) 4) y = - x + 2 + 8 Initial Point: ( , )
Chart
Chart
5)
r(x) = - x + 4 Initial Pt: ( , ) 6) y = - 1 x + 2 + 8 Initial Pt: ( , )
2
Chart
Chart
Find the inverses. 7. y = 3x + 5
8. y = 2x2 ? 10
9. y = 2 3x -1 + 4
10. y = 4x3 ? 10
Verify that the functions are inverses.
11.
f
(
x)
=
5x - 2
3
g(x
)
=
2x + 5
3
12. f (x) = 2x2 - 3
g(x) = x + 3 2
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