document.write( "Question 975914: {a, b, c, d} subset {a, b, c, d} \n" ); document.write( "
Algebra.Com's Answer #597572 by Edwin McCravy(20060)\"\" \"About 
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document.write( "If a set has N elements, it has 2N subsets.\r\n" );
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document.write( " {a,b,c,d}\r\n" );
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document.write( "This set has 4 elements, so it has 24 or 16 subsets:\r\n" );
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document.write( " 1. { } or ⌀  <-- the empty set  \r\n" );
document.write( " 2. {a}\r\n" );
document.write( " 3. {b}\r\n" );
document.write( " 4. {c}\r\n" );
document.write( " 5. {d}\r\n" );
document.write( " 6. {a,b}\r\n" );
document.write( " 7. {a,c}\r\n" );
document.write( " 8. {a,d}\r\n" );
document.write( " 9. {b,c}\r\n" );
document.write( "10. {b,d}\r\n" );
document.write( "11. {c,d}\r\n" );
document.write( "12. {a,b,c}\r\n" );
document.write( "13. {a,b,d}\r\n" );
document.write( "14. {a,c,d}\r\n" );
document.write( "15. {b,c,d}\r\n" );
document.write( "16. {a,b,c,d}  <-- the whole set, which IS considered a subset, but\r\n" );
document.write( "                   it is not considered a PROPER subset, like the other 15.\r\n" );
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document.write( "Edwin
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