document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1039591>Question 1039591</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the following exponential equation.<BR>\n" );
document.write( "e^x+e^-x=5\r<BR>\n" );
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document.write( "The&#8203; solution(s) is/are ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #654354 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=654354\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> e^x+e^-x=5<BR>\n" );
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document.write( "Sub u for e^X<BR>\n" );
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document.write( "U + 1/U = 5<BR>\n" );
document.write( "u^2 + 1 = 5u<BR>\n" );
document.write( "u^2 - 5u + 1 = 0<BR>\n" );
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document.write( "Solve the quadratic for u, then sub e^x for u.<BR>\n" );
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document.write( "PS<BR>\n" );
document.write( "(e^x + e^-x)/2 = cosh(x)<BR>\n" );
document.write( "e^x + e^-x = 2.5<BR>\n" );
document.write( "x = cosh-1(2.5)<BR>\n" );
document.write( "x =~ 1.566799\r<BR>\n" );
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document.write( " </SPAN>\n" );
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