document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1104793>Question 1104793</A>: <I><SPAN STYLE=\"word-break: break-all;\"> fonction of composition  (Fog)(x)=1/x^2   and g(x)= 2x+1   <BR>\n" );
document.write( "find f(x)=?\r<BR>\n" );
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document.write( "thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #719564 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13209)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=719564\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "We want f(g(x)) to be equal to 1/x^2, or x^-2.<br><BR>\n" );
document.write( "Solve the function g(x) for the variable x: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=g%28x%29+=+2x%2B1 ALIGN=MIDDLE  ALT=\"g%28x%29+=+2x%2B1\"   DISABLED_style= \"max-width:90%; height:auto;\" >  -->  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28g%28x%29-1%29%2F2 ALIGN=MIDDLE  ALT=\"x+=+%28g%28x%29-1%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "Then f(x) must be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%28x-1%29%2F2%29%5E%28-2%29 ALIGN=MIDDLE  ALT=\"%28%28x-1%29%2F2%29%5E%28-2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "CHECK:<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f%28g%28x%29%29+=+%28%28g%28x%29-1%29%2F2%29%5E-2+=+%28%282x%2B1-1%29%2F2%29%5E-2+=+x%5E-2+=+1%2Fx%5E2 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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