document.write( "Question 1169395: In this arithmetic sequence wee are given that S1=9 AND S2=20
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Algebra.Com's Answer #794084 by ikleyn(52794) $\"\"$ $\"About$

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\n" ); document.write( "In this arithmetic sequence wee are given that S1=9 AND S2=20
\n" ); document.write( "What is the 4th $\"highlight%28cross%28terms%29%29\"$ term.
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\n" ); document.write( "\n" ); document.write( "            Pay your attention on how I edited your post to make it consistent with the English language.\r
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\n" ); document.write( "\n" ); document.write( "            Also, your post does not define what the S1 and S2 are.\r
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\n" ); document.write( "\n" ); document.write( "            Traditionally, and by default, Sn means the sum of n terms of an arithmetic progression, \r
\n" ); document.write( "\n" ); document.write( "            and I interpret it EXACTLY in this way.\r
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\n" ); document.write( "\n" ); document.write( "            Two other tutors interpret it DIFFERENTLY.\r
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\n" ); document.write( "\n" ); document.write( "            So, been so inaccurate in formulation your problem, you should not be surprising when you obtain different answers.\r
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\n" ); document.write( "\n" ); document.write( "            It is TOTALLY and ENTIRELY YOUR FAULT.\r
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document.write( "The first term is   = 9   (from S1 = 9).\r\n" );
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document.write( "Hence, the second term is  20-9 = 11   (from S2 = 20).\r\n" );
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document.write( "Thus the common difference is 11-9 = 2.\r\n" );
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document.write( "Then the third term is  11+2 = 13,\r\n" );
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document.write( "and the fourth term is 13+2 = 15.    ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "For introductory lessons on arithmetic progressions see \r
\n" ); document.write( "\n" ); document.write( "    - Arithmetic progressions\r
\n" ); document.write( "\n" ); document.write( "    - The proofs of the formulas for arithmetic progressions \r
\n" ); document.write( "\n" ); document.write( "    - Problems on arithmetic progressions \r
\n" ); document.write( "\n" ); document.write( "    - Word problems on arithmetic progressions\r
\n" ); document.write( "\n" ); document.write( "in this site.\r
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\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook in ALGEBRA-II in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-II - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this online textbook under the topic \"Arithmetic progressions\".\r
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\n" ); document.write( "\n" ); document.write( "Save the link to this textbook together with its description\r
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\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-II
\n" ); document.write( "https://www.algebra.com/algebra/homework/complex/ALGEBRA-II-YOUR-ONLINE-TEXTBOOK.lesson\r
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\n" ); document.write( "\n" ); document.write( "into your archive and use when it is needed.\r
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