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AnnZ [28]
3 years ago
13

A geometric sequence has a common ration(s) of 3 and the 8th term (a8) is 13,122. What

Mathematics
1 answer:
nikdorinn [45]3 years ago
3 0

Answer:

First term a = 6

Step-by-step explanation:

a (first term) = ?

r (common ratio) = 3

T₈ (8th term) = 13122

The nth term of a geometric progression gp is

Tn = arⁿ⁻¹

T₈ = ar⁸⁻¹

T₈ = ar⁷

13122 = a * 3⁷

13122 = a * 2187

a = 13122 / 2187

a = 6.

The first term a = 6

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