document.write( "Question 1196396: Use the sets to find (DuE)nF\r
\n" ); document.write( "\n" ); document.write( "Let D​={4​,7​,9​}, E=​{4​,6​,7​,8​}, and F​{3​,5​,6​,7​,9​} \n" ); document.write( "
Algebra.Com's Answer #829203 by MathLover1(20855)\"\" \"About 
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\n" ); document.write( "Use the sets to find
\n" ); document.write( "Let D​={4​,7​,9​}
\n" ); document.write( "E=​{4​,6​,7​,8​}
\n" ); document.write( " F=​{3​,5​,6​,7​,9​}\r
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\n" ); document.write( "\n" ); document.write( "first find (D ∪ E) which is defined as the set that consists of all elements belonging to either set D or set E (or both)\r
\n" ); document.write( "\n" ); document.write( "so,\r
\n" ); document.write( "\n" ); document.write( "(D ∪ E) ={4​,6​,7​,8,9​}\r
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\n" ); document.write( "\n" ); document.write( "recall: The set A ∩ B—read “A intersection B” or “the intersection of A and B”—is defined as the set composed of all elements that belong to both A and B. \r
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\n" ); document.write( "\n" ); document.write( "in your case A=(D ∪ E) and B= F\r
\n" ); document.write( "\n" ); document.write( "so, you have\r
\n" ); document.write( "\n" ); document.write( "(D ∪ E) ∩ F={4​,6​,7​,8,9​} ∩ {3​,5​,6​,7​,9​}={6​,7​,9​}\r
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