document.write( "Question 713491: write the rule for the sequence 2, 9, 21, 38,...
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Algebra.Com's Answer #438471 by josgarithmetic(39618)\"\" \"About 
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The difference appears to be prime numbers. That being a pattern is not a certain thing, but that's what the difference between consecutive terms gives. See plainly that the prime numbers demonstrated are not consecutive. \r
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\n" ); document.write( "\n" ); document.write( "2 to 9 ---- 7
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\n" ); document.write( "\n" ); document.write( "Those four numbers are not a pattern.
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