document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=256816>Question 256816</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A hyperbolic mirror (used in some telescopes) has property that a light ray directed at a focus will be reflected to the other focus. The focus of a hyperbolic mirror can be represented on a rectangular coordinate system by coordinates (24,0). Find the vertex of the mirror if the Mount at the the top edge of the mirror has coordinates (24,24). Sketch the focus, vertex, and part of the hyperbola to represent the mirror. Can you explain this? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #827780 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52797)</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=827780\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .\r<BR>\n" );
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document.write( "The goal of my post is to &nbsp;DISPROVE &nbsp;the solution by other tutor,\r<BR>\n" );
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document.write( "given long time ago &nbsp;(probably, &nbsp;20 &nbsp;years ago).\r<BR>\n" );
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document.write( "The problem is about hyperbolic mirror, &nbsp;but the other tutor solves it for parabolic mirror,\r<BR>\n" );
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document.write( "without any explanations, &nbsp;why he &nbsp;(or she) &nbsp;solves different problem.\r<BR>\n" );
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document.write( "So, &nbsp;ignore that solution as &nbsp;IRRELEVANT.\r<BR>\n" );
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document.write( "I looked at other solutions of this tutor and noticed that they are quite accurate \r<BR>\n" );
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document.write( "and are written in good style; &nbsp;so, &nbsp;this case looks like a random accident . . . \r<BR>\n" );
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