Which sequences are geometric? Check all that apply. - 2.7, - 9, - 30, - 100, ... - 1, 2.5, - 6.25, 15.625, ... 9.1, 9.2, 9.3, 9.4, ... 8, 0.8, 0.08, 0.008, ... 4, - 4, - 12, - 20, ...

Question

Chessie

Mathematics

13 February, 13:51

Which sequences are geometric? Check all that apply. - 2.7, - 9, - 30, - 100, ... - 1, 2.5, - 6.25, 15.625, ... 9.1, 9.2, 9.3, 9.4, ... 8, 0.8, 0.08, 0.008, ... 4, - 4, - 12, - 20, ...

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Braylon Bean · Answer 1

Geometric sequences are:

-1, 2.5, - 6.25, 15,625, ...

8, 0.8, 0.08, 0.008, ...

Geometric sequence is a sequence of numbers term after the first term is found by multiplying the previous term by a common ratio - - a fixed, none-zero number.

-1 * - 2.5 = 2.5

2.5 * - 2.5 = - 6.25

-6.25 * - 2.5 = 15.625

8 * 0.10 = 0.8

0.8 * 0.10 = 0.08

0.08 * 0.10 = 0.008