document.write( "Question 993270: The sets D and E are defined as: D= {y|y < 2} and E= {y|y ≥ 7}
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\n" ); document.write( " D ∩ E = ?
\n" ); document.write( " D ∪ E = ? \n" ); document.write( "

Algebra.Com's Answer #612560 by Edwin McCravy(20056) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "Draw D and E on number lines\r\n" );
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document.write( "D:\r\n" );
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document.write( "<===============○------------------------------\r\n" );
document.write( "-3 -2 -1  0  1  2  3  4  5  6  7  8  9 10 11 12\r\n" );
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document.write( "E:\r\n" );
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document.write( "-------------------------------●==============>\r\n" );
document.write( "-3 -2 -1  0  1  2  3  4  5  6  7  8  9 10 11 12\r\n" );
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document.write( "D ∩ E = ?\r\n" );
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document.write( "That asks for the set of numbers which the two graphs\r\n" );
document.write( "have in common.  They have NO elements in common, so\r\n" );
document.write( "the interval notation is () or the empty set ⌀. \r\n" );
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document.write( "D ∪ E = ?\r\n" );
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document.write( "That asks for the set of numbers which are part of\r\n" );
document.write( "either or both sets.  So we put the two graphs together\r\n" );
document.write( "on the same number line and get\r\n" );
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document.write( "<===============○--------------●==============>\r\n" );
document.write( "-3 -2 -1  0  1  2  3  4  5  6  7  8  9 10 11 12\r\n" );
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document.write( "The interval notation is\r\n" );
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document.write( "Edwin

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