document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=858285>Question 858285</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the first term of an A.p if the 5th term is 28 and sum of the first 17th term is Zero </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #517151 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=517151\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the first term of an A.p if the 5th term is 28 and sum of the first 17th term is Zero\r<BR>\n" );
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document.write( "tn = a+(n-1)d\r<BR>\n" );
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document.write( "28 = a+4d\r<BR>\n" );
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document.write( "a+4d= 28....................(1)\r<BR>\n" );
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document.write( "Sn = n/2( 2a+(n-1)d))\r<BR>\n" );
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document.write( "0= (17/2)(2a+16d)\r<BR>\n" );
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document.write( "0= 17(2a+16d)\r<BR>\n" );
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document.write( "34a+272d=0<BR>\n" );
document.write( "/34<BR>\n" );
document.write( "a+8d=0.....................(2)\r<BR>\n" );
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document.write( "subtract (2) from (1)\r<BR>\n" );
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document.write( "we get -4d=28<BR>\n" );
document.write( "d= -7\r<BR>\n" );
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document.write( "Now a+4d=28\r<BR>\n" );
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document.write( "a+4*(-7)=28\r<BR>\n" );
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document.write( "a-28=28<BR>\n" );
document.write( "a=56\r<BR>\n" );
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document.write( " </SPAN>\n" );
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