document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1079599>Question 1079599</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a series has first term 7 and 5th term 23. find the common difference , 15th term and sum of the first 10 terms. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #693838 by </B><A HREF=/tutors/aboutme.mpl?userid=amfagge92><B>amfagge92(93)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=amfagge92><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=amfagge92><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=693838\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a=7 5th term=23<BR>\n" );
document.write( "&#8658;T5th=7+4d=23<BR>\n" );
document.write( "7+4d=23<BR>\n" );
document.write( "4d=16<BR>\n" );
document.write( "d=4<BR>\n" );
document.write( "&#8658;common difference=4\r<BR>\n" );
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document.write( "15th term=a+14d\r<BR>\n" );
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document.write( "7+(14*4)=63\r<BR>\n" );
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document.write( "&#8658;15th term=63\r<BR>\n" );
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document.write( "Sum of 10th term<BR>\n" );
document.write( "=n/2{2a+(n-1)d}<BR>\n" );
document.write( "10/2{2*7+(9*4)}<BR>\n" );
document.write( "=250<BR>\n" );
document.write( " </SPAN>\n" );
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