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document.write( "The 3 is really
\r\n" );
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document.write( "
,
,
, ...\r\n" );
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document.write( "This is an arithmetic sequence with first term
and common\r\n" );
document.write( "difference
\r\n" );
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document.write( "
\r\n" );
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document.write( "
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document.write( "Solve that and get n=31, so -17 is the 31st term.\r\n" );
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document.write( "Edwin
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document.write( "