document.write( "Question 743334: Some sequences involve a pattern but are not arithmetic. Find the sum of the first 72-terms in the sequence 6,8,2,..., where An=(A(n-1))-(A(n-2))(The last term ia equal to the (last term minus 1) minus (the last term minus 2))\r
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Algebra.Com's Answer #452841 by Edwin McCravy(20060)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "The first 9 terms of the sequence are\r\n" );
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document.write( "6, 8, 2,-6,-8,-2, 6, 8, 2,-6,-8,-2 which have sum 0.\r\n" );
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document.write( "The next 9 terms are the same, which also have sum 0, etc. etc.\r\n" );
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document.write( "72 terms is 8 groups of those same 9 terms, each having sum 0,\r\n" );
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document.write( "Therefore the entire sum is 0.\r\n" );
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document.write( "Edwin
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