document.write( "Question 979587: Write an equation for the sequence of numbers below, in terms of n.
\n" ); document.write( " 3 6 10 15 21
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Algebra.Com's Answer #600941 by ikleyn(52790)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "\"a%5B1%5D\" = 3 \r
\n" ); document.write( "\n" ); document.write( "\"a%5B2%5D\" = 6 \r
\n" ); document.write( "\n" ); document.write( "\"a%5B3%5D\" = 10 \r
\n" ); document.write( "\n" ); document.write( "\"a%5B4%5D\" = 15 \r
\n" ); document.write( "\n" ); document.write( "\"a%5B5%5D\" = 21\r
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\n" ); document.write( "\n" ); document.write( "General formula:  \"a%5Bk%5D\" = \"a%5Bk-1%5D\" + \"%28k%2B1%29\",
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