document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1039984>Question 1039984</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I'm having a hard time w/ this and could really use some help please!:\r<BR>\n" );
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document.write( "For \"a\" am I multiplying the denominator to get rid of it and coming up w/ something like f^-1(y)= (x-something?). I'm not sure there.\r<BR>\n" );
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document.write( "Let   f(x)=(6 - x)/(3 + 4x)       \r<BR>\n" );
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document.write( "(a)  Find f^-1 , the inverse function of f.  Show work.\r<BR>\n" );
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document.write( "(b) What is the domain of f ? What is the domain of the inverse function?\r<BR>\n" );
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document.write( "(c) What is f(3) ?           f (3) = _1/5___                                   \r<BR>\n" );
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document.write( "(d) What is f^-1 ( ____ ), where the number in the blank is your answer from part (c)?    \r<BR>\n" );
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document.write( "I\"m getting really stressed and could use some help please. Thank you!<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #654766 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=654766\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> f(x)=(6-x)/(3+4x)<BR>\n" );
document.write( "x=(6-y)/(3+4y), interchange x and y<BR>\n" );
document.write( "3x+4xy=6-y<BR>\n" );
document.write( "y+4xy=6-3x<BR>\n" );
document.write( "y(1+4x)=6-3x<BR>\n" );
document.write( "y=f inv (x)=(6-3x)/(1+4x)<BR>\n" );
document.write( "domain of original function is all x except -(1/4)<BR>\n" );
document.write( "domain of inverse function is all x except x=(-1/4)<BR>\n" );
document.write( "f(3)=3/15=1/5<BR>\n" );
document.write( "f inv (1/5)=(6-3/5)/(1+4/5)<BR>\n" );
document.write( "This is 27/5/9/5, or 3.<BR>\n" );
document.write( "Notice how it gives the original f(3) result back.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28300%2C200%2C-10%2C10%2C-10%2C10%2C%286-x%29%2F%283%2B4x%29%2C%286-3x%29%2F%281%2B4x%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >  Notice the symmetry around the line y=x.<BR>\n" );
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