3 years ago

Find an explicit formula for the geometric sequence 3,15,75,375 a(n)=

Mathematics

1 answer:

DENIUS [597]3 years ago

8 0

Answer:

an = 3(5)^(n-1).

Step-by-step explanation:

15 / 3 = 5

75/15 = 5

375/75 = 5

So the common ratio is 5.

First term a1 =3

an = a1 r^(n-1) is the explicit formula.

so here we have:

an = 3(5)^(n-1).

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