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What is the common ratio for the sequence 5, -10, 20, -40, ...? -2 -1/2 1/2 2
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5 votes
What is the common ratio for the sequence 5, -10, 20, -40, ...?

-2

-1/2

1/2

2

User Nihique
by
7.9k points

1 Answer

4 votes

Common ratio is -2

5 x (-2) = -10

-10 x (-2) = 20

20 x (-2) = -40

User Brasileric
by
8.6k points
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