document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=920296>Question 920296</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Show that: <BR>\n" );
document.write( "2[(2n-1)C(n-1)] = 2nCn </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #558320 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=558320\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE _{n}C_{r} = \frac{n!}{r!*(n-r)!}\">\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE _{2n-1}C_{n-1} = \frac{2n(2n-1)!}{2n(n-1)!*(n)!}\"> Multiply top and bottom by 2n.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE 2*(_{2n-1}C_{n-1}) = \ \ \ _{2n}C_{n}\"> </SPAN>\n" );
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