document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=919810>Question 919810</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Given the function f(x)=3x^3+2, find the value of x so that f^-1(x)=4. Thank you. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #558028 by </B><A HREF=/tutors/aboutme.mpl?userid=richard1234><B>richard1234(7193)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richard1234><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=richard1234><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=558028\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> f(4) = 3*4^3 + 2 = 194\r<BR>\n" );
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document.write( "Taking f^(-1) of both sides, 4 = f^(-1)(194), so x in this case is 194. Note that f is bijective (more precisely one-to-one), so it has an inverse function. </SPAN>\n" );
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