document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=655710>Question 655710</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What is the formula for f^-1(x) when f(x)=2x+5 and what is the domain of f^-1? And how did you find the answer? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #409245 by </B><A HREF=/tutors/aboutme.mpl?userid=MathDazed><B>MathDazed(34)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathDazed><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=MathDazed><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=409245\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> To find the inverse of a function you simply put it to 'y' and make 'x' the subject\r<BR>\n" );
document.write( "\n" );
document.write( "f(x) = 2x + 5<BR>\n" );
document.write( "y = 2x +5<BR>\n" );
document.write( "y - 5 = 2x<BR>\n" );
document.write( "(y-5)/2 = x\r<BR>\n" );
document.write( "\n" );
document.write( "Then you interchange x with y<BR>\n" );
document.write( "Therefore you should now have y = (x-5)/2\r<BR>\n" );
document.write( "\n" );
document.write( "f^-1(x) = (x-5)/2<BR>\n" );
document.write( "Domain is all real numbers </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );