Question

Given a geometric sequence in the table below, create the explicit formula and list any restrictions to the domain

Answer 1

n an
1 –4
2 20
3 –100

answers:
an = –5(–4)^n – 1 where n ≥1
an = –4(–5)^n – 1 where n ≥1
an = –4(5)^n – 1 where n ≥–4
an = 5(–4)^n – 1 where n ≥–4

Answer 2

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