document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=58715>Question 58715</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Telephoto lens.  Use the formula 1/F=1/O + 1/I to find the image distance I for an object that is 2,000,000 mm from 250 mm telephoto lens. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #40255 by </B><A HREF=/tutors/aboutme.mpl?userid=funmath><B>funmath(2933)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=funmath><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=40255\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Telephoto lens.  Use the formula 1/F=1/O + 1/I to find the image distance I for an object that is 2,000,000 mm from 250 mm telephoto lens.<BR>\n" );
document.write( "F=250 mm<BR>\n" );
document.write( "0=2,000,000<BR>\n" );
document.write( "It's often easier to solve the formula for the value you want and then plug in your values.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2FF=1%2FO%2B1%2FI ALIGN=MIDDLE  ALT=\"1%2FF=1%2FO%2B1%2FI\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2FF-1%2FO=-1%2FO%2B1%2FO%2B1%2FI ALIGN=MIDDLE  ALT=\"1%2FF-1%2FO=-1%2FO%2B1%2FO%2B1%2FI\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2FF-1%2FO=1%2FI ALIGN=MIDDLE  ALT=\"1%2FF-1%2FO=1%2FI\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=O%2FFO-F%2FFO=1%2FI ALIGN=MIDDLE  ALT=\"O%2FFO-F%2FFO=1%2FI\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28O-F%29%2FFO=1%2FI ALIGN=MIDDLE  ALT=\"%28O-F%29%2FFO=1%2FI\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%28O-F%29%2FFO%29%5E%28-1%29=%281%2FI%29%5E-1 ALIGN=MIDDLE  ALT=\"%28%28O-F%29%2FFO%29%5E%28-1%29=%281%2FI%29%5E-1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=FO%2F%28O-F%29=I%2F1 ALIGN=MIDDLE  ALT=\"FO%2F%28O-F%29=I%2F1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=I=FO%2F%28O-F%29 ALIGN=MIDDLE  ALT=\"I=FO%2F%28O-F%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Plug in your values:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=I=%28250%29%282000000%29%2F%282000000-250%29 ALIGN=MIDDLE  ALT=\"I=%28250%29%282000000%29%2F%282000000-250%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=I=%28500000000%2F1999750%29 ALIGN=MIDDLE  ALT=\"I=%28500000000%2F1999750%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=I=250.0312539 ALIGN=MIDDLE  ALT=\"I=250.0312539\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "I=250 mm after you round off to sig. figs.<BR>\n" );
document.write( ":\r<BR>\n" );
document.write( "\n" );
document.write( "Now, if you think about it, your ariginal formula was:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2FF=1%2FO%2B1%2FI ALIGN=MIDDLE  ALT=\"1%2FF=1%2FO%2B1%2FI\"   DISABLED_style= \"max-width:90%; height:auto;\" >  2,000,000 is aproaching infinity, so 1/2,000,000 is very close to 0.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2FF=0%2B1%2FI ALIGN=MIDDLE  ALT=\"1%2FF=0%2B1%2FI\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=F=I ALIGN=MIDDLE  ALT=\"F=I\"   DISABLED_style= \"max-width:90%; height:auto;\" >  which is what we ended up with.<BR>\n" );
document.write( "Happy Calculating!!! </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );