document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=644513>Question 644513</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Let S and T be sets. Prove that if x &#8713; S &#8745; T, then X &#8713; S or X &#8713; T. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #405075 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=405075\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If x &#8713; S &#8745; T, then x is NOT in both sets at the same time. So it must be in one or the other set (or in neither set). So x is exclusively in one set, but not in the other.\r<BR>\n" );
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document.write( "So say x is in set T, but not in set S. Then X &#8713; S would be true.\r<BR>\n" );
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document.write( "OR\r<BR>\n" );
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document.write( "say x is in set S, but not in set T. Then X &#8713; T would be true.\r<BR>\n" );
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document.write( "If x is in neither set, then both X &#8713; S and X &#8713; T would be true.\r<BR>\n" );
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