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Pearson Algebra 1 Common Core, 2011 View details

8. Unions and Intersections of Sets

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Exercise 41 Page 220

Think of the first set as the x-coordinates and the second set as the y-coordinates.

{ (π,2), (π,4), (2π,2), (2π,4), (3π,2), (3π,4), (4π,2), (4π,4)}

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We can think of the first set A as the x-coordinates and the second set B as the y-coordinates. The cross product of two sets A and B is written as A* B, where all elements in A are paired with each element in B in ordered pair form (a,b). A&={ π , 2π, 3π, 4π} B&={2, 4} A* B &={ ( π,2), ( π,4), & ( 2π,2), ( 2π,4), & ( 3π,2), ( 3π,4), & ( 4π,2), ( 4π,4)}