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Mathematics 15 Online
OpenStudy (anonymous):

What is the common ratio of the following sequence? 2, -4, 8, -16

OpenStudy (oaktree):

For the common ratio, it's a term divided by the one before it.

OpenStudy (oaktree):

So we pick any two (-4 and 2, for example) and divide them. What's -4/2?

OpenStudy (oaktree):

...?

OpenStudy (anonymous):

2

OpenStudy (oaktree):

2? Check your sign.

OpenStudy (anonymous):

-2

OpenStudy (oaktree):

That's your ratio.

OpenStudy (anonymous):

Multiply By -2 .... I Thinkk . But IM NOT POSITIVE (:

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