document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1073522>Question 1073522</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Another operation that can be defined on sets A and B is the difference of the sets, denoted by \r<BR>\n" );
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document.write( "A &#8722; B.<BR>\n" );
document.write( " Here is the formal definition of the difference of sets A and B. \r<BR>\n" );
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document.write( "A &#8722; B = {x | x is in A  and  x not in B} <BR>\n" );
document.write( " Thus \r<BR>\n" );
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document.write( "A &#8722; B<BR>\n" );
document.write( " is the set of elements that belong to A but not to B. For instance, let \r<BR>\n" );
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document.write( "A = {1, 2, 3, 7, 8}<BR>\n" );
document.write( " and \r<BR>\n" );
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document.write( "B = {2, 7, 11}.<BR>\n" );
document.write( " Then \r<BR>\n" );
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document.write( "A &#8722; B = {1, 3, 8}.\r<BR>\n" );
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document.write( " Determine the difference, given that \r<BR>\n" );
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document.write( "U = {1, 2, 3, 4, 5, 6, 7, 8, 9},<BR>\n" );
document.write( " \r<BR>\n" );
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document.write( "A = {2, 4, 6, 8},<BR>\n" );
document.write( " and \r<BR>\n" );
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document.write( "B = {1, 6, 8, 9}.<BR>\n" );
document.write( " (Enter your answers as a comma-separated list.) \r<BR>\n" );
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document.write( "A &#8722; B' = </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #688332 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52782)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=688332\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "<PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\">\r\n" );
document.write( "Let me simplify the problem.\r\n" );
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document.write( "Let A = {1,2}  and  B = {2}.\r\n" );
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document.write( "Can you find A - B on your own ?\r\n" );
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document.write( "Let it will be your FIRST step.\r\n" );
document.write( "</PRE>\r<BR>\n" );
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document.write( "As the second step, read attentively what you are given - the text, the definitions, the example - and EVERYTHING must be clear to you,<BR>\n" );
document.write( "because it is explained very carefully.\r<BR>\n" );
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document.write( "I just see that you are able to copy and past the text and to submit it to the forum.\r<BR>\n" );
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document.write( "I can not believe that you are not able to understand what is written in your instruction !\r<BR>\n" );
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document.write( "You can !!\r<BR>\n" );
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document.write( " </SPAN>\n" );
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