Copyright 2006 Melanie Butler Chapter 1: Review. Chapter 1: Review
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1 QUIZ AND TEST INFORMATION: The material in this chapter is on Quiz 1 and Exam 1. You should complete at least one attempt of Quiz 1 before taking Exam 1. This material is also on the final exam. TEXT INFORMATION: The material in this chapter corresponds to the review sections of your text book. Please read these sections and complete the assigned homework from the text that is given on the last page of the course syllabus. There is a lot of review material and it will only be gone over briefly in class. LAB INFORMATION: There is no lab which specifically corresponds to the review material, but you will need this material to complete other labs. 1
2 Section 1: Number Systems and Sets of Numbers Definition: A set is. Definition: Roster Form Description of a Set: list out the elements of Example: a set between curly brackets Note: If you want to denote an infinite set, write down elements until Example: the pattern becomes clear then put an ellipse (.). Definition: Set builder notation: {x x satisfies certain conditions} Example: Definition: Natural numbers = Definition: Whole numbers = Definition: Integers = Definition: Rational Numbers = Definition: Irrational Numbers =
3 Definition: Real numbers = the set of rational and irrational numbers Order of Operations: 1. Parentheses. Exponents 3. Multiplication and Division 4. Addition and Subtraction Example: Distributive Property: 1. 4(x - 1) =. (x + 5)(x + 1) = Domain: Determine the domain of 3. x( x 4) Interval notation: 1. [0,1]= On a number line this looks like: 3
4 . (0,1) = On a number line this looks like: 3. [0,1) = On a number line this looks like: 4. (0,1] = On a number line this looks like: Interval notation with infinity ( ): 1. (, ) = On a number line this looks like:. [, ) = On a number line this looks like: 3. (-, ) = On a number line this looks like: 4. (-, ] = On a number line this looks like: 4
5 Definition: The union of two sets, A and B, is the set consisting of. Definition: The intersection of two sets, A and B, is the set consisting of. Other examples and notes: 5
6 Section : Integer Exponents Laws of exponents: 6
7 Example 1: Simplify the expressions using the laws of exponents. 1.. (-) (-) Example : Simplify the expression. Write your answer using positive exponents only. y = x x y Pythagorean Theorem: 7
8 Other examples and notes: 8
9 Section 3: Polynomial Expressions Definition: A monomial is an expression of the form, where. Example: Definition: A polynomial is an expression of the form, where. Example: Definition: The degree of the polynomial is. Example: The degree of the above example of a polynomial is. Example 1: Some examples of expressions that are not polynomials are: 9
10 Example : We can add, subtract, and multiply polynomials. Examples: Example 3: We can also divide a polynomial by a second nonzero polynomial. Example: 10
11 Note: When we divide polynomials, we have that the Dividend = (divisor)(q ) + r Example 4: We also factor polynomials. Example: Factor p(x) = x - 3x 18. Example: Factor q(x) = x 3 x. Other examples and notes: 11
12 Section 5: Rational Expressions Definition: A rational expression is an expression of the form, where. Definition: A rational expression is in simplest form when. Example 1: Simplify the rational expression: x x + x. + 4x + 3 x x Example : Simplify the rational expression:. x 4x + 4 1
13 1 1 Example 3: Add the rational expressions: + x 3 3 x Example 4: Multiply the rational expressions: x + 4x + 4 4x 4. 3 x x x + 3x + Other examples and notes: 13
14 Section 3: Radicals and Rational Exponents Notation for Rational Exponents: Example 1: Sketch the graph of y = x 1/ = x. Properties of Radicals and Rational Exponents: 14
15 Example : Simplify ( 4). Example 3: Simplify (4) 1/. Example 4: Simplify 1x. Example 5: Simplify x 4x. 15
16 Example 6: Simplify Example 7: Simplify Example 8: Simplify x y. Example 9: Simplify (x 4 y 8 ) 5/4. 16
17 Rationalize the denominator: The goal is to multiply the expression by an appropriate expression so that the denominator does not contain any. Example 10: Rationalize the denominator: Example 11: Rationalize the denominator:. 7 Other examples and notes: 17
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