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guajiro [1.7K]
4 years ago
15

Determine if the series 7+28+112+448 has a sum

Mathematics
1 answer:
zysi [14]4 years ago
8 0
S4=a1- a4 r / 1-r
=7- 448*4 / 1-4
=7- 1792 / -3
=-1785/-3
=595
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