gavincampbell19 gavincampbell19

05-06-2019
Mathematics

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Find the sum of the first 25 terms of a geometric sequence where the first term is 177,147 and the common ratio is -1/3

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Аноним Аноним

19-07-2019

Answer:

132860 to nearest whole number.

Step-by-step explanation:

Sum of n terms = a1 .(r^n - 1) / (r - 1).

S25 = 177,147 ((-1/3)^25 - 1) / (-1/3 - 1)

= 177,147 * -1 / -4/3

= 132860.

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