document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1010711>Question 1010711</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am stuck on this problem.  If I can see this worked out it would help a lot!\r<BR>\n" );
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document.write( "If f(x) = (1/x - 9x) / (1+3x), what is f(1/x).\r<BR>\n" );
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document.write( "My book says the answer is x-3 but I cannot get this same answer. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #626189 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=626189\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  If f(x) = (1/x - 9x) / (1+3x), what is f(1/x). <BR>\n" );
document.write( "f(1/x) = ((1/(1/x))-9(1/x)) / (1+3(1/x)) =<BR>\n" );
document.write( "(x - (9/x)) / (1 + 3(1/x)) =<BR>\n" );
document.write( "((x^2-9) / x) / ((x+3) / x)) =<BR>\n" );
document.write( "(((x+3)(x-3)) / x) * (x / (x+3)) =<BR>\n" );
document.write( "(x-3)<BR>\n" );
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