By Robert F. Blitzer

ISBN-10: 0321837347

ISBN-13: 9780321837349

Bob Blitzer has encouraged hundreds of thousands of scholars together with his attractive method of arithmetic, making this loved sequence the number 1 out there. Blitzer attracts on his special heritage in arithmetic and behavioral technology to offer the whole scope of arithmetic with shiny functions in real-life occasions. scholars remain engaged simply because Blitzer frequently makes use of pop-culture and up to date references to attach math to students’ lives, displaying that their global is profoundly mathematical.

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Extra resources for Precalculus (5th Edition)

Sample text

Such equations, together with the meaning assigned to the variables, are called mathematical . 4. The set of elements common to both set A and set B is called the of sets A and B, and is symbolized by . 5. The set of elements that are members of set A or set B or of both sets is called the of sets A or B and is symbolized by . 6. The set {1, 2, 3, 4, 5, c} is called the set of numbers. 7. The set {0, 1, 2, 3, 4, 5, c} is called the set of numbers. 8. The set {c, -4, -3, -2, -1, 0, 1, 2, 3, 4, c} is called the set of .

If a term containing one or more variables is written without a coefﬁcient, the coefﬁcient is understood to be 1. Thus, z means 1z. If a term is a constant, its coefﬁcient is that constant. Thus, the coefﬁcient of the constant term -3 is -3. 7x+(–9y)+z+(–3) Coefficient is 7. GREAT QUESTION! What is the bottom line for combining like terms? To combine like terms mentally, add or subtract the coefﬁcients of the terms. Use this result as the coefﬁcient of the terms’ variable factor(s). Coefficient is −9.

In Exercises 148–155, determine whether each statement is true or false. If the statement is false, make the necessary change(s) to produce a true statement. 148. 149. 150. 151. 152. 153. 154. 155. Every rational number is an integer. Some whole numbers are not integers. Some rational numbers are not positive. Irrational numbers cannot be negative. The term x has no coefﬁcient. 2 Objectives ᕡ Use properties of exponents. ᕢ Simplify exponential ᕣ 159. In parts (a) and (b), complete each statement.