document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1161791>Question 1161791</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the equation of a line normal to the curve x^2=16y at (4,1). </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #785402 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=785402\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font face=\"Times New Roman\" size=\"+2\">\r<BR>\n" );
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document.write( "Rewrite the given equation so that y is a function of x.\r<BR>\n" );
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document.write( "Take the first derivative of the function and evaluate at x = 4 giving you the slope of the tangent line at (4,1)\r<BR>\n" );
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document.write( "Use the negative reciprocal of the slope of the tangent line and the point (4,1) in the Point-Slope form to write <i>an</i> equation for the line normal to the given curve at the given point.  You cannot write <i>the</i> equation for a line because there is a myriad of forms for the equation of any given line.<BR>\n" );
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document.write( "John<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE e^{i\pi}\ +\ 1\ =\ 0\"><BR>\n" );
document.write( "My calculator said it, I believe it, that settles it<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\Large \ \\r\"> </SPAN>\n" );
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