document.write( "Question 880265: Find the sum of the first 40 terms of 14,17,20,...
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Algebra.Com's Answer #531286 by richwmiller(17219)\"\" \"About 
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S = ½(2a + (n-1)d)n
\n" ); document.write( "S = ½(2*14 + 3*39)40
\n" ); document.write( "S = 20(28 + 117)
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\n" ); document.write( "s=2900
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