3, Review Exerclses In Problems 1-3, for each pair of functions f and g, find: (b) (gof) (-2) (a) (fog) (2) 1. f(x) = 3x – 5; g(x) = 1 – 2r² (c) (f•f) (4) (b) (gog) (-1) 2. f(x) = Vx + 2; g(x) = 2x² + 1 %3D
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
![Cat OF the time required to double
å lump sum of money (p. 330)
1 Model populations that obey the law of uninhibited
growth (p. 335)
2 Model populations that obey the law of uninhibited decay (p. 337)
3 Use Newton's Law of Cooling (p. 338)
4 Use logistic models (p. 340)
1 Build an exponential model from data (p. 346)
2 Build a logarithmic model from data (p. 348)
3 Build a logistic model from data (p. 348)
6,7
51
5.8
1,2
55
3
53, 56
4
54
5,6
57
5.9
1
58
59
3
60
Review Exercises
(b) (gof)(-2)
(a) (fog) (2)
1. f(x) = 3x – 5; g(x) = 1 – 2r?
(c) (fof)(4)
2. f(x) = Vx + 2; g(x) = 2x² + 1
Problems 4-6, find f ° g, g ° f, ƒ° f, and g º g for each pair of functions. State the domain of each composite function.
(b) (g°g) (-1)
3. f(x) = e*; g(x) = 3x – 2
4. f(x) = 2 – x; g(x) = 3x + 1
7 (e) Verify that the function below is one-to-one. (b) Find its inverse.
{ (1,2), (3, 5), (5, 8), (6, 10) }
8 The graph of a function f is given below. State why f is one-to-one. Then draw the graph of the inverse function f.
5. f(x) = V3x; g(x) = 1 + x + x?
x + 1
1
6. f(x) = 8(x) =
eview Exerdser
4
y = X
(3, 3)
-4
(2, 0) 4 X
(0, -2)
(-1,-3)
n Problems 9 and 10, verify that the functions f and g are inverses of each other by showing that f(g(x)) = x and g(f(x)) = x.
any values of x that need to be excluded from the domain of f and the domain of g.
Give
40)
4
1
Ex + 2
X - 4
;8(x)
9. f(x) = 5x – 10; g (x)
10. f(x)
1- x
%3D](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fed398b18-d726-4d2c-b4f7-dcea12dc23a3%2F741583f8-bb69-4c15-ab96-af164b7e06b8%2Fk5i32bl_processed.jpeg&w=3840&q=75)
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