Question

Which sequences are geometric? Select three options.

O-27,-9, -30, -100,...
O-1, 2.5, -6.25, 15.625,
9.1, 92, 93, 94,
8, 0.8, 0.08, 0.008,
4,-4, -12, -20,...

Answer 1

Below in bold.

Explanation:

In a geometric sequence each term after the first is found by multiplying the preceding one by a constant value, called the common ratio.

They are:

-1, 2.5, -6.25, 15.625,.. Here the common ratio = -2.5.

8, 0.8, 0.08, 0.008,. - common ratio is 0.1.