document.write( "Question 1173564: Proof that (AUB)UC= AU(BUC) \n" ); document.write( "

Algebra.Com's Answer #798801 by ikleyn(52864) $\"\"$ $\"About$

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document.write( "If an element x belongs to the left hand side, then it belongs to one of the sets A, B or C.\r\n" );
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document.write( "Hence, it belongs to the set in the right hand side.\r\n" );
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document.write( "In opposite, if an element y belongs to the right hand side, then it belongs to one of the set A, B or C.\r\n" );
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document.write( "Hence, it belongs to the set in the left hand side.\r\n" );
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document.write( "It proves that the left hand side set is the same as the right hand side set,\r\n" );
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\n" ); document.write( "\n" ); document.write( "and the statement is proved.\r
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