Which formula describes the following geometric sequence? Remember that n represents the term number.

2, 6, 18, 54, ...

A. an = 2 · 3n - 1

B. an = 3 · 2n - 1

C. an = 2 + 3 (n - 1)

D. an = 3 + 2 (n - 1)

Question

Marie Booth

10 April, 05:58

+4

Answers (1)

Know the Answer?

Antony Peck · Answer 1

The formula on nth term is l=ar^ (n-1)

The 1st term is 2 & r, the ration = 3

Then is 2x3^ (n-1). Mind you (n-1) is an exponent on 3

Which formula describes the following geometric sequence? Remember that n represents the term number.2, 6, 18, 54, ...A. an = 2 · 3n - 1B. an = 3 · 2n - 1C. an = 2 + 3 (n - 1)D. an = 3 + 2 (n - 1)