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Mathematics, 03.05.2020 13:07 lazok

Find Sn for the given series:
a1=22
d=-8
n=21
a) 1911
c) -2436
b) -1449
d) -1218

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Find Sn for the given series:
a1=22
d=-8
n=21
a) 1911
c) -2436
b...
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