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Mathematics
Mathematics
Problem
Find the sum of the first 20 terms of the AP
5
,
8
,
11
,
…
5,\,8,\,11,\dots
5
,
8
,
11
,
…
a)
700
700
700
b)
660
660
660
c)
670
670
670
d)
1340
1340
1340
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