document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1208650>Question 1208650</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An electric circuit contains three resistors connected in parallel. If the resistance of each is R_1, R_2, ams R_3 ohms, respectively, their combined resistance R is given by the formula\r<BR>\n" );
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document.write( "1/R = (1/R_1) + (1/R_2) + (1/R_3)\r<BR>\n" );
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document.write( "A. Express R as a rational expression. \r<BR>\n" );
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document.write( "B. Evaluate R for R_1 = 5 ohms, R_2 = 4 ohms, and R_3 = 10 ohms\r<BR>\n" );
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document.write( "Let me see.\r<BR>\n" );
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document.write( "I think for A, I need to solve for R. If so, I will use a for R_1, b for R_2, and c for R_3 for easy cell phone typing.\r<BR>\n" );
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document.write( "1/R = 1/a + 1/b + 1/c\r<BR>\n" );
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document.write( "After much effort on paper, solving for R leads me to\r<BR>\n" );
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document.write( "R = (abc)/(bc + ac + ab).\r<BR>\n" );
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document.write( "Is this correct? If so, part B is just plug and chug. \r<BR>\n" );
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document.write( "You say?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #847039 by </B><A HREF=/tutors/aboutme.mpl?userid=Shin123><B>Shin123(626)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Shin123><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=Shin123><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=847039\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hi, for a), you did it correctly. Just make sure to plug back in R_1, R_2, and R_3 for a, b, and c in the final expression. Part b) shouldn't be too hard since you have that already. </SPAN>\n" );
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