arithmetic, geometric, or neither: 2, -6, 18, -54, 162, -486

Question

please answer , thankss :)

Answer 1

Given sequence 2,-6,18,-54,162,-486

In a geometric sequence each term(except the first term) is found by multiplying the previus term by constant.

a,ar,ar^2,ar^3,..ar^n.

This sequence has a factor of negitive 3 between each number.

r = -3.

Given sequence is geometric sequence.