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Liono4ka [1.6K]
3 years ago
15

What is sn for the arithmetic series with a1=3 an=-38 and n=8?

Mathematics
1 answer:
otez555 [7]3 years ago
4 0
Sn = n/2 (a1+an)
= 8/2 (3-38)
= 4 (-35)
= -140
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