Answers

2016-06-28T21:46:18+08:00
294 is the answer.

a=3(1)+5=8
a=3(2)+5=11
common difference=3
Sn=n/2[2A1+(n-1)d]
Sn=12/2[2(8)+(12-1)3]
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2016-06-28T21:46:44+08:00
8,11,14,17,20,23,26,29,32,35,38,41=294
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