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OpenStudy (anonymous):

4. What is the r value of the following geometric sequence? 20, 40, 80, 160,… a. 2 b. 3 c. 4 d. 5

OpenStudy (anonymous):

I think it's 2, that was stupid. :3

OpenStudy (anonymous):

the common ratio i.e r would be 2.

OpenStudy (anonymous):

divide any number in the sequence by the previous number and you get the value of r.. eg: 40/20, 80/40, 160/80.. the value of r wont change..

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