document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=973960>Question 973960</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve this. <BR>\n" );
document.write( "For the following function determine the values of x for which f is (a) an increasing function (b) a decreasing function (c) constant\r<BR>\n" );
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document.write( "f(x) = (4x+20)^9<BR>\n" );
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document.write( "               4\r<BR>\n" );
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document.write( "f'(x) = 9((4x+20)^8)\r<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 #596029 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=596029\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (4x+20)^9<BR>\n" );
document.write( "when x= -5, the function is 0.  When x= -4.75 the function is 1. Those are constants<BR>\n" );
document.write( "When x < -5 it is decreasing.<BR>\n" );
document.write( "When x >-5 it is increasing.\r<BR>\n" );
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document.write( "The derivative is 9(4x+20)^8 *4, which equals 0 when x=-5<BR>\n" );
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