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VARVARA [1.3K]
3 years ago
9

A geometric sequence has these terms: a1 = 8, a2 = 20, az = 50, and a4 = 125.

Mathematics
1 answer:
stira [4]3 years ago
7 0

Answer:

a_{n} = 8(2.5)^{n-1}

Step-by-step explanation:

The n th term of a geometric sequence is

a_{n} = a(r)^{n-1}

where a is the first term and r the common ratio

Here a = 8 and r = \frac{20}{8} = 2.5, thus

a_{n} = 8(2.5)^{n-1}

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