Need algebra help with Arithmetic and geometric sequences: Identifying and writing an explicit rule

Algebra
Tutor: None Selected Time limit: 1 Day

Dec 18th, 2015

Hello!

1) geometric, common ratio 1/3, n-th term is  (-27)*(1/3)^(n-1) = (-81)*(1/3)^n = -3^(4-n)

2) arithmetic, difference -4,  n-th term is  2-4*(n-1) = 6-4n.

Please ask if something is unclear.
Dec 18th, 2015

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