document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=772822>Question 772822</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do you write a set In a roster for and in set-builder notation  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #471134 by </B><A HREF=/tutors/aboutme.mpl?userid=tommyt3rd><B>tommyt3rd(5050)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=tommyt3rd><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=tommyt3rd><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=471134\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The names of the formats are self explanatory - which is a common practice in math. Roster form is a listing of elements whereas set-builder notation is a way of describing what elements are in a set. If a set has elements that cannot be listed completely then set builder notation is a viable option. \r<BR>\n" );
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document.write( "Suppose E1 is the set of even numbers between 2 and 12 then either form will work:\r<BR>\n" );
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document.write( "E1={4,6,8,10}={n: 2|n and 2 < n < 12}\r<BR>\n" );
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document.write( "Now let E2 be the even number between 2 and 12,000,000,000. Roster form is really no longer practical - and this isn't even an infinite set. So we use builder notation.\r<BR>\n" );
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document.write( "E2={n: 2|n and 2 < n < 12*10^9} </SPAN>\n" );
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