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Chapter 4: Solving Inequalities

Chapter 4: Solving Inequalities. Set Notation. Set. A group of things In algebra, this is a group of numbers that are related somehow. elements. Numbers that are included in the sets. Set Notation. Ø empty set C complex numbers (algebra 2) N natural numbers

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Chapter 4: Solving Inequalities

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  1. Chapter 4: Solving Inequalities Set Notation

  2. Set • A group of things • In algebra, this is a group of numbers that are related somehow

  3. elements • Numbers that are included in the sets

  4. Set Notation • Ø empty set • C complex numbers (algebra 2) • N natural numbers • Q rational numbers (think fractions) • R real numbers • Z integers

  5. Other Notation • Union of two sets: • Means that you take two sets and combine all of their elements • Intersection of two sets: • Means that you only keep the elements that are in both sets of numbers

  6. Example 1 • C = {6, 9, 12, 15, 18, 21} • D = {x | x is a positive odd integer} • What is C ∩ D?

  7. Example 2 • P = {5, 10, 15, 20} • Q = { 8, 10, 18, 20} • Find P U Q

  8. Homework • P. 233 • 1-8

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