document.write( "Question 1199651: The sum of the first four terms of a linear sequence A.p is 26 and that of the next four term is 74. find the value of the first term ,the common difference \n" ); document.write( "
Algebra.Com's Answer #833663 by MathTherapy(10552)\"\" \"About 
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document.write( "The sum of the first four terms of a linear sequence A.p is 26 and that of the next four term is 74. find the value of the first term ,the common difference\r\n" );
document.write( "Sum of an A.P.: \"matrix%281%2C3%2C+S%5Bn%5D%2C+%22=%22%2C+%28n%2F2%29%282a%5B1%5D+%2B+%28n+-+1%29d%29%29\"\r\n" );
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document.write( "                      First 4 terms:                           ALL 8 terms, including terms 5 - 8:\r\n" );
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document.write( "                                  13 = 2a1 + 3d ---- eq (i)\r\n" );
document.write( "                                  25 = 2a1 + 7d ---- eq (ii)\r\n" );
document.write( "                                  12 = 4d ----- Subtracting eq (i) from eq (ii)\r\n" );
document.write( "            Common difference, or \r\n" );
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document.write( "                                  13 = 2a1 + 9 ----- Substituting 3 for d in eq (i)\r\n" );
document.write( "                              13 - 9 = 2a1 \r\n" );
document.write( "                                   4 = 2a1 \r\n" );
document.write( "                  First term, or
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