Math help! Sequences?

the sum of the first 40 terms of this sequence 222+211+200

2007-10-03 17:00:12 · 1 answers · asked by gamesplayer56 2 in Education & Reference ➔ Homework Help

1 answers

40(222) - [the 39th triangular number times 11]

http://www.research.att.com/~njas/sequences/?q=triangular+numbers&sort=0&fmt=0&language=english

40(222) - [40(40 - 1)/2](11) = 300

2007-10-03 22:53:54 · answer #1 · answered by jsardi56 7 · 0⤊ 0⤋

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