Geometry Series in Math

If the tribes of a sequence of geometries are summed, a geometry series will be formed.

Example of Geometry Series in Math

If "0 < r < 1" then use the formula:

If "r > 1" then use the formula:

The relationship formula between U_n and S_n :

Information :
S = Geometry series
r = Ratio
a = The first tribe
U = Tribe
n = Tribal position

Example of Geometry Series in Math

Please determine the sum of 1 + 2 + 4 + 8 + ... (up to 13 tribes) !

Answer:
a = 1
r = 2/1 = 2
n = 13

so the sum of 1 + 2 + 4 + 8 + ... (up to 13 tribes) is 8191.

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Referensi :

• To'Ali's book math group accounting and sales

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