document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1123335>Question 1123335</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do you determine the point (x,y) at which the graph of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+f%28x%29+=+%28-8x%29%2Fsqrt%282x-1%29+ ALIGN=MIDDLE  ALT=\"+f%28x%29+=+%28-8x%29%2Fsqrt%282x-1%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > has a horizontal tangent? <BR>\n" );
document.write( "So far I get d/dx to be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-8%282x-1%29-8x%29%2F%28%282x-1%29%5E%283%2F2%29%29 ALIGN=MIDDLE  ALT=\"%28-8%282x-1%29-8x%29%2F%28%282x-1%29%5E%283%2F2%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > but what do you do to get a point value? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #739640 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39630)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=739640\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Keep going.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=df%2Fdx=%28-8x%2B8%29%2F%28%282x-1%29sqrt%282x-1%29%29 ALIGN=MIDDLE  ALT=\"df%2Fdx=%28-8x%2B8%29%2F%28%282x-1%29sqrt%282x-1%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "This derivative is 0 at <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=1 ALIGN=MIDDLE  ALT=\"x=1\"   DISABLED_style= \"max-width:90%; height:auto;\" >, and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f%281%29=-8 ALIGN=MIDDLE  ALT=\"f%281%29=-8\"   DISABLED_style= \"max-width:90%; height:auto;\" >. </SPAN>\n" );
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