document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=76319>Question 76319</A>: <I><SPAN STYLE=\"word-break: break-all;\"> given f(x)= 4x/x+2, find f-1(x) (inverse of function x) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #54767 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=54767\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> f(x)= 4x/x+2, find f-1(x) <BR>\n" );
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document.write( "Interchange x and y to get the inverse.<BR>\n" );
document.write( "x= y/y+2<BR>\n" );
document.write( "Solve for \"y\":<BR>\n" );
document.write( "yx+2x=y<BR>\n" );
document.write( "yx-y=-2x<BR>\n" );
document.write( "y(x-1)=-2x<BR>\n" );
document.write( "y=-2x/(x-1)<BR>\n" );
document.write( "That is the inverse.\r<BR>\n" );
document.write( "\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );