document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1032832>Question 1032832</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 13x^2+3y^2=39\r<BR>\n" );
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document.write( "Need focus of the given ellipse\r<BR>\n" );
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document.write( "smaller y value?<BR>\n" );
document.write( "larger y value? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #647411 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=647411\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> From<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=13x%5E2%2B3y%5E2=39 ALIGN=MIDDLE  ALT=\"13x%5E2%2B3y%5E2=39\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "we divide by 39 and get<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2%2F3+%2B+y%5E2%2F13+=+1 ALIGN=MIDDLE  ALT=\"x%5E2%2F3+%2B+y%5E2%2F13+=+1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "This is a \"tall\" ellipse.<BR>\n" );
document.write( "c^2 = 13 - 3 = 10<BR>\n" );
document.write( "so that the foci are at<BR>\n" );
document.write( "(0, sqrt(10)) and (0, -sqrt(10)) </SPAN>\n" );
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