document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1201812>Question 1201812</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the nth term for this increasing arithmetic sequence:<BR>\n" );
document.write( "2,4,6,8,10...  </SPAN>\n" );
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document.write( "ANSWER: 2n<br><BR>\n" );
document.write( "The common difference is 2, so the formula for the n-th term is 2n+a for some number a.<br><BR>\n" );
document.write( "When n=1, the term is 2, so<br><BR>\n" );
document.write( "2(1)+a = 2<BR>\n" );
document.write( "2+a = 2<BR>\n" );
document.write( "a = 0<br><BR>\n" );
document.write( "So the formula for the n-th term is 2n+0, or just 2n.<br><BR>\n" );
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