document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=169812>Question 169812</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Of all theses sets which ones are proper subsets {}- {a} - {b} - {c} - {d} - {a,b} - {a,c} - {a,d} - {b,c} - {b,d} - {c,d} - {a,b,c} - {a,b,d} - {a,c,d} - {b,c,d} - {a,b,c,d} I know that the empty set is a proper subset and I think that the next 4 after that are as well but I am not sure about the other ones, any help would be appreciated. <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #125205 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=125205\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> All are proper subsets except {a,b,c,d},<BR>\n" );
document.write( "which is a subset but not a PROPER subset.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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