document.write( "Question 5701: Is 3 1/2 an element of the set of real numbers or naturals?\r
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Algebra.Com's Answer #3117 by FadelSalem(12)\"\" \"About 
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there are many set of numbers:
\n" ); document.write( "Count number set = {1,2,3,4,..........}\r
\n" ); document.write( "\n" ); document.write( "N=Natural Numbers set ={0,1,2,3,4,......}
\n" ); document.write( "It consists of count numbers set with zero\r
\n" ); document.write( "\n" ); document.write( "Z= Integer numbers set = {....,-3,-2,-1,0,1,2,3,....}
\n" ); document.write( "Z= All natural numbers set with negatives.\r
\n" ); document.write( "\n" ); document.write( "Q= Rational numbers set ={a/b: a,b are integers, b doesn't equal zero}
\n" ); document.write( "Q= All integers with all decimials and fractions\r
\n" ); document.write( "\n" ); document.write( "Q`=Irrational numbers set (numbers cannot be in Q)
\n" ); document.write( "Q` doesn't contain any number from Q \"it contains numbers as Sqrt3, Pi, etc\"\r
\n" ); document.write( "\n" ); document.write( "R=Real numbers set\"All numbers represented on number's line\"
\n" ); document.write( "R contains all previous sets
\n" ); document.write( "so we find 3 1/2 in Q, R only and it doesn't contained in N or Z
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