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Lesson 1.3 Unit 1, Lesson 3

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Set:A collection of distinct objects Elements:All of the objects that make up a set.

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The set of all positive integers less than ten.

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Some Common notation errors: {2, -2} x = {2, -2} {x = 2, -2} {x = 2} {x = -2} Variables are not part of set notation

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Empty set

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{7, -1} or {-1, 7} The order of the elements does not matter

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* 3. x + 3 = -5 x = -8 * 4. |6x - 7| + 10 = 0 |6x - 7| = -10 x = no solution

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Union:Combining the elements of two or more sets.

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Intersection:The elements that two or more sets have in common

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X= {2,4,6,8,10,12} Y={1,2,3,4,5,6}

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X= {2,4,6,8,10,12} Y={1,2,3,4,5,6} Z = {1,2,4,5}

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