Student Center
|
Instructor Center
|
Information Center
|
Home
Course Success
Math on the Web
How's Your Math?
Graphing Calculator Workshop
Midtext Diagnostic Review
NetTutor
SMART CD Grade Book Register
Glossary
Elementary Algebra Review
Choose a Chapter
Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
Chapter 7
Chapter 8
Chapter 9
Chapter 10
Chapter 11
Chapter 12
Chapter 13
Chapter 14
Learning Objectives
Chapter Outline
Key Terms
Internet Exercises
Enrich Your Math Word Power
Pre-Test
Post-Test
Chapter Overview
Choose a Section
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Warm-Ups
Section Text
Audio/Visual Tutorial Practice
Practice Test
Feedback
Help Center
Elementary and Intermediate Algebra
Mark Dugopolski, Southeastern Louisiana University
Functions
Combining Functions
Warm-Ups
1
If f (x) = x - 2 and g(x) = x + 3, then ( f - g)(x) = -5.
A)
TRUE
B)
FALSE
2
If f (x) = x + 4 and g(x) = 3x, then (f/g)(2) = 1.
A)
TRUE
B)
FALSE
3
The functions f º g and g º f are always the same.
A)
TRUE
B)
FALSE
4
If f (x) = x
2
and g(x) = x + 2, then ( f º g)(x) = x
2
+ 2.
A)
TRUE
B)
FALSE
5
The functions f º g and f º g are always the same.
A)
TRUE
B)
FALSE
6
If f (x) = x
1/2
and g(x) = x - 9, then g( f (x)) = f (g(x)) for every x.
A)
TRUE
B)
FALSE
7
If f (x) = 3x and g(x) = x/3, then ( f º g)(x) = x.
A)
TRUE
B)
FALSE
8
If a = 3b
2
- 7b, and c = a
2
+ 3a, then c is a function of b.
A)
TRUE
B)
FALSE
9
The function F(x) = (x - 5)
1/2
is a composition of two functions.
A)
TRUE
B)
FALSE
10
If F(x) = (x - 1)
2
, h(x) = x - 1, and g(x) = x
2
, then F = g º h.
A)
TRUE
B)
FALSE
2002 McGraw-Hill Higher Education
Any use is subject to the
Terms of Use
and
Privacy Policy
.
McGraw-Hill Higher Education
is one of the many fine businesses of
The McGraw-Hill Companies
.