2.1 and 2.2

# 2.1 and 2.2 - C Order on a Number Line a Natural numbers or...

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Sets and The Number Line A) Sets a. A set has members or elements i. , a {a,b,c} b. Empty or null set i. , { } c. Subsets i. {a} {a,b,c} ii. Every set is a subset of itself iii. If something is not a subset then we write {a} {b,c} d. Union i. Definition: is the set of all elements that belong to one or both sets. ii. e. Intersection i. Defintion: is the set of all elements common to the sets ii. f. The difference between ‘intersect’ and ‘intersection’ i. Intersect- two sets intersect if there are one or more elements that are common to the sets ii. Intersection- allows for the possibility of the empty set B) Take a look at the packet

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Unformatted text preview: C) Order on a Number Line a. Natural numbers or counting numbers i. 1,2,3,4,5,6,7,…… b. Whole number i. 0,1,2,3,4,……. . c. Integer i. ….-3,-2,-1,0,1,2,3…. . d. Rational numbers i. b a where ≠ b ii. 5 4 , 3 2 iii. Cannot fill up a number line b/c there are so many e. Irrational numbers i. Numbers that can’t be expressed as ratios of integers ii. π , 3 , 2 D) Turn to page 22 to go over the properties E) Existence of Square roots a. Every positive number has exactly one positive square root HW# 2 Packet problems in class 1a (3,4,5,8,10,12) 1b (2,3,6,7) 1c (1,2,3,4) p. 18 (1-10) p. 25...
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2.1 and 2.2 - C Order on a Number Line a Natural numbers or...

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