document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=74017>Question 74017</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am studying for a final and I'm really having a difficult time with functions.  I don't know why I don't understand them, but I don't.  Please help with the following:\r<BR>\n" );
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document.write( "Given f(x)= 1/sqrt of x and g(x) = 1-x^2 evaluate the following:<BR>\n" );
document.write( "a)   g(2a+1)<BR>\n" );
document.write( "b)   g(f(x))\r<BR>\n" );
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document.write( "Thank you for your help. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #53021 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=53021\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Given f(x)= 1/sqrt of x and g(x) = 1-x^2 evaluate the following:<BR>\n" );
document.write( "a) g(2a+1)<BR>\n" );
document.write( "Substitute \"2a+1\" for x to get:<BR>\n" );
document.write( "g(2a+1) = 1 - (2a+1)^2<BR>\n" );
document.write( "=1 -[4a^2+4a+1]<BR>\n" );
document.write( "= -4a^2-4a<BR>\n" );
document.write( "------------\r<BR>\n" );
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document.write( "b) g(f(x)) <BR>\n" );
document.write( "=g[(1/sqrt(x)]<BR>\n" );
document.write( "= 1 - (1/sqrt(x))^2<BR>\n" );
document.write( "= 1 - (1/x)<BR>\n" );
document.write( "-------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
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