document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=680309>Question 680309</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can you tell me if I have done this correctly?  For the function f(x)=(3-4x)^2, find f^-1.  Determine whether f^-1 is a function.<BR>\n" );
document.write( "sq rt.y=3-4x<BR>\n" );
document.write( "sq rt y^-3=-4x<BR>\n" );
document.write( "x=(sq rt y^-3)/-4<BR>\n" );
document.write( "f^-1(x)=sq rt y^-3/-4  and it is not a function.  Thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #422284 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=422284\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Can you tell me if I have done this correctly?  For the function f(x)=(3-4x)^2, find f^-1.  Determine whether f^-1 is a function.<BR>\n" );
document.write( "sq rt.y=3-4x<BR>\n" );
document.write( "sq rt y^-3=-4x ****** The ^ is unnecessary and confusing ****<BR>\n" );
document.write( "x=(sq rt y^-3)/-4<BR>\n" );
document.write( "f^-1(x)=sq rt y^-3/-4  and it is not a function.  Thanks<BR>\n" );
document.write( "-------------------<BR>\n" );
document.write( "f(x)=(3-4x)^2<BR>\n" );
document.write( "y = (3-4x)^2<BR>\n" );
document.write( "--> x = (3-4y)^2<BR>\n" );
document.write( "3-4y = sqrt(x)<BR>\n" );
document.write( "y = (3 - sqrt(x))/4  Same as your answer.\r<BR>\n" );
document.write( "\n" );
document.write( "Not a function.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );