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6, 9/2 27/8 find seventh term

1 Answer

6 votes

Answer: 7th term is 2187/2048

Explanation:

The common ratio is 3/4

r is the common ratio

a(sub n) = r * a(sub n-1)

9/2 = r * 6

r = (9/2)* (1/6) = 3/4

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27/8 = r * (9/2)

r = (27/8) / (9/2) = (27/8) * (2/9) = 3/4

a(sub n) = r^(n-1)* a(sub 0), let a(sub 0) = a(sub 1)

a(sub 7) = (3/4)^(7 - 1) * (6)

a(sub 7) = [(3/4)^6 ] * 6

a(sub 7) = (729/ 4096) * 6

a(sub 7) = 2187/2048

7th term is 2187/2048

User Michael Delgado
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