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200, 20, 2, 0.2

Here you have 4 terms. Add them together, and you find the sum of these four terms. If you need to find the sum of some other terms, i.e 8 terms, then you can use the formula

Sn = [a1(r^n - 1/(r - 1) where n = 8, a1 = 200, and r = 1/10.

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15y ago
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Q: Find the value Sn in the geometric sequence 200 20 2 0.2?
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