document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=690058>Question 690058</A>: <I><SPAN STYLE=\"word-break: break-all;\"> please help: if f(x)=(5x+B)/(2x-A) and f(2)=0, f(4)=undefined, then find A and B\r<BR>\n" );
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document.write( "Thanks for any help </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #426591 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=426591\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> if f(x)=(5x+B)/(2x-A) and f(2)=0, f(4)= undefined, then find A and B <BR>\n" );
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document.write( "Find A first, f(4) undefined, division by 0, so we have<BR>\n" );
document.write( "2x - A = 0<BR>\n" );
document.write( "x=4<BR>\n" );
document.write( "2(4) - A = 0<BR>\n" );
document.write( "8 - A = 0<BR>\n" );
document.write( "A = 8<BR>\n" );
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document.write( "Replacing A with 8, f(2)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%285x%2BB%29%2F%282x-8%29 ALIGN=MIDDLE  ALT=\"%285x%2BB%29%2F%282x-8%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 0<BR>\n" );
document.write( "x = 2<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%285%282%29%2BB%29%2F%282%282%29-8%29 ALIGN=MIDDLE  ALT=\"%285%282%29%2BB%29%2F%282%282%29-8%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 0<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2810%2BB%29%2F%28-4%29 ALIGN=MIDDLE  ALT=\"%2810%2BB%29%2F%28-4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 0<BR>\n" );
document.write( "B=-10 </SPAN>\n" );
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