document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=200529>Question 200529</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The brackets may have confused in the previous version of the question I submitted. \r<BR>\n" );
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document.write( "This a question for solving electrical resistance in a parallel circuit. The formula is 1/Rt = 1/R1 + 1/R2 +1/R3 + 1/Rn.\r<BR>\n" );
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document.write( "Rt represents total resistance the other fractions are separate branch resistances.\r<BR>\n" );
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document.write( "1/Rt= 1/12 + 1/15 + 1/5<BR>\n" );
document.write( "Rt=?\r<BR>\n" );
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document.write( "Thank you  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #150765 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=150765\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font face=\"Garamond\" size=\"+2\">\r<BR>\n" );
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document.write( "Just add the fractions like any other fractions.  Find the lowest common denominator, convert each of the three fractions, then add the numerators.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ 12 = 3 \times 2 \times 2\">\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ 15 = 3 \times 5\">\r<BR>\n" );
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document.write( "And <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE 5\"> only has the factor <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE 5\">\r<BR>\n" );
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document.write( "So, you need two 2s, one 3, and one 5 as factors for your LCD.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \  2 \times 2 \times 3 \times 5 = 60\">\r<BR>\n" );
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document.write( "So:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ \frac{1}{R_t}= \left(\frac{1}{12}\right)\left(\frac{5}{5}\right) + \left(\frac{1}{15}\right)\left(\frac{4}{4}\right) + \left(\frac{1}{5}\right)\left(\frac{12}{12}\right) = \frac{5}{60}+\frac{4}{60}+\frac{12}{60} = \frac{21}{60} = \frac{7}{20}\">\r<BR>\n" );
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document.write( "Therefore\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ R_t = \frac{20}{7}\">\r<BR>\n" );
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document.write( "Just a little less than 3.\r<BR>\n" );
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document.write( "By the way, your general formula should be represented thus:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ \frac{1}{R_t} = \frac{1}{R_1} +  \frac{1}{R_2} +\ .\,.\,.\ + \frac{1}{R_n}\">\r<BR>\n" );
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document.write( "indicating an indefinite number of terms.\r<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" );
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