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sattari [20]
2 years ago
11

The first three terms of a sequence are given. Round to the nearest thousandth (if necessary).

Mathematics
2 answers:
BaLLatris [955]2 years ago
6 0

Answer:

a₆ ≈ 25.284

Step-by-step explanation:

There is a common ratio between consecutive terms , that is

8 ÷ 6 = \frac{32}{3} ÷ 8 = \frac{4}{3}

This indicates the sequence is geometric with nth term

a_{n} = a₁ r^{n-1}

where a₁ is the first term and r the common ratio

Here a₁ = 6 and r = \frac{4}{3} , then

a₆ = 6 × (\frac{4}{3}) ^{5} = 6 × \frac{1024}{243} = \frac{6(1024)}{243} ≈ 25.284 ( to the nearest thousandth )

Brums [2.3K]2 years ago
5 0

Step-by-step explanation:

it is a geometric sequence.

the common ratio or factor is 4/3.

I got this by simply trying to get from the 2nd to the 3rd term.

8×x = 32/3

24x = 32

x = 32/24 = 16/12 = 8/6 = 4/3

s1 = 6

s2 = s1 × 4/3 = 6 × 4/3 = 24/3 = 8

s3 = s2 × 4/3 = s1 × 4/3 × 4/3 = 6 × 16/9 = 2 × 16/3 = 32/3

sn = s1 × (4/3)^(n-1)

s6 = 6 × (4/3)⁵ = 6 × 1024/243 = 2 × 1024/81 = 2048/81 =

= 25.284

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