Flash22 Flash22

21-09-2018
Mathematics

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What is the common ratio for the sequence 5, -10, 20, -40, ...?

-2

-1/2

1/2

2

Respuesta :

choixongdong choixongdong

21-09-2018

Common ratio is -2

5 x (-2) = -10

-10 x (-2) = 20

20 x (-2) = -40

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