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OpenStudy (anonymous):
What is the common ratio of the sequence 2, -6, 18, -54?
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OpenStudy (anonymous):
c.r=a2/a1
OpenStudy (anonymous):
I don't get it?..
OpenStudy (anonymous):
-6/2=?
OpenStudy (anonymous):
3. so that's the common ratio?
OpenStudy (anonymous):
-3
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