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What is the common ratio of the sequence? -2, 6, -18, 54,...
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3 votes
What is the common ratio of the sequence?

-2, 6, -18, 54,...

User Mike Robinson
by
8.3k points

2 Answers

3 votes

Answer:

the common ratio is -3

Explanation:

User Cwhsu
by
7.6k points
3 votes
a1=-2
a2=6
a3=-18


the common ratio musbe negative since the signs alternate

it is multiilied by 3 ach time

comon ratio is -3
an=-2(-3)^(n-1)
User Armahg
by
8.4k points
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