document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=182391>Question 182391</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help with constructing this proof. Can you help me?\r<BR>\n" );
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document.write( "Use the laws of inference to prove that the conclusion is true. Include statements and reasons in your formal proof.\r<BR>\n" );
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document.write( "24. Given: c-> b<BR>\n" );
document.write( "           a v ~b<BR>\n" );
document.write( "           c<BR>\n" );
document.write( "    <BR>\n" );
document.write( "    Prove: a <BR>\n" );
document.write( "                                          Thank you, sincerely<BR>\n" );
document.write( "                                           freakertennis@yahoo.com </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #136887 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=136887\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font face=\"Times New Roman\" size=\"+2\">\r<BR>\n" );
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document.write( "You are given that <i>c</i> is true and 'if <i>c</i> then <i>b</i>', hence <i>b</i> is true.  But you also know that '<i>a</i> or 'not <i>b</i>' ' is true.  In order for an 'or' statement to be true, at least one of its parts must be true.  Since we have proven <i>b</i> is true, 'not <i>b</i>' must be false.  Since 'not <i>b</i>' is false, the only way for '<i>a</i> or 'not <i>b</i>' ' to be true is if <i>a</i> is true.  QED.\r<BR>\n" );
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document.write( "John<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE e^{i\pi} + 1 = 0\"><BR>\n" );
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