document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=288795>Question 288795</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help.<BR>\n" );
document.write( "I don't know how to start solving this problem: If f(x)=2^x-1 and g(x) = x^2-1, determine the value of (f o g)(3)<BR>\n" );
document.write( "Thank you for your time </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #209281 by </B><A HREF=/tutors/aboutme.mpl?userid=texttutoring><B>texttutoring(324)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=texttutoring><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=texttutoring><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=209281\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This is a composition of functions problem.\r<BR>\n" );
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document.write( "I assume that f(x) should be written like this:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f%28x%29=2%5Ex-1 ALIGN=MIDDLE  ALT=\"f%28x%29=2%5Ex-1\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=g%28x%29=x%5E2-1 ALIGN=MIDDLE  ALT=\"g%28x%29=x%5E2-1\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "(f o g)(3) means put x=3 into g(x), get a number, and then put that number into f(x)\r<BR>\n" );
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document.write( "Here's how it's done:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=g%283%29=%283%29%5E2-1 ALIGN=MIDDLE  ALT=\"g%283%29=%283%29%5E2-1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=g%283%29=8 ALIGN=MIDDLE  ALT=\"g%283%29=8\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Now find f(8):\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f%288%29=%282%29%5E8+-+1 ALIGN=MIDDLE  ALT=\"f%288%29=%282%29%5E8+-+1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f%288%29=256-1 ALIGN=MIDDLE  ALT=\"f%288%29=256-1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f%288%29=255 ALIGN=MIDDLE  ALT=\"f%288%29=255\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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