document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=289607>Question 289607</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Using the limit definition compute the instantaneous rate of change of the function at x=a   f(x)=9x^2,   a=8\r<BR>\n" );
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document.write( "answer is  144, I keep getting 153. Please help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #209712 by </B><A HREF=/tutors/aboutme.mpl?userid=CharlesG2><B>CharlesG2(834)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=CharlesG2><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=209712\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Using the limit definition compute the instantaneous rate of change of the function at x=a   f(x)=9x^2,   a=8\r<BR>\n" );
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document.write( "answer is  144, I keep getting 153. Please help!\r<BR>\n" );
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document.write( "(not sure if you put this in right category, but nevermind)\r<BR>\n" );
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document.write( "Instantaneous Rate of Change --> The rate of change at a particular moment. Same as the value of the derivative at a particular point.\r<BR>\n" );
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document.write( "f(x) = 9x^2, x = a, where a = 8<BR>\n" );
document.write( "f'(x) = 2 * 9 * x = 18x (took derivative)<BR>\n" );
document.write( "f'(a) = 18a<BR>\n" );
document.write( "f'(8) = 18 * 8 = 144\r<BR>\n" );
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document.write( "have no idea how you got 153<BR>\n" );
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