document.write( "Question 972657: I have a question over unions and intersections of sets. My question is A={1,2,3,4,5,6,7,8,9} and B={2,4,6,8} what is A U B? This would be mighty awesome if you can help me. Thanks
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Algebra.Com's Answer #595277 by Theo(13342)![]() ![]() You can put this solution on YOUR website! A union B are the set of elements that are either in A or in B or in both. \n" ); document.write( "A = {1,2,3,4,5,6,7,8,9} \n" ); document.write( "B = {2,4,6,8} \n" ); document.write( "A union B would be {1,2,3,4,5,6,7,8,9} \n" ); document.write( "These are the elements that are either in A or in B or in both. \n" ); document.write( "Actually, all of the elements in B are also in A. \n" ); document.write( "That makes B a subset of A because all of the elements in B are also in A. \n" ); document.write( "A intersect B are the set of elements that are in both A and B. \n" ); document.write( "A intersect B is therefore equal to {2,4,6,8} \n" ); document.write( "Those are the elements that are in both A and in B. \n" ); document.write( "So, what you have here is: \n" ); document.write( "A union B = A = {1,2,3,4,5,6,7,8,9} \n" ); document.write( "A intersect B = {2,4,6,8} \n" ); document.write( "B is a subset of A. \n" ); document.write( " \n" ); document.write( " |