SOLUTION: Question 7 What is the common ratio of the series? 1/2 + 1 + 2 + 4 ... Question 8 What is the common difference of the series? 10 + 4 - 2 - 8 + ...

Algebra ->  Sequences-and-series -> SOLUTION: Question 7 What is the common ratio of the series? 1/2 + 1 + 2 + 4 ... Question 8 What is the common difference of the series? 10 + 4 - 2 - 8 + ...      Log On


   

Question 82552: Question 7
What is the common ratio of the series?
1/2 + 1 + 2 + 4 ...


Question 8
What is the common difference of the series?
10 + 4 - 2 - 8 + ....


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Answer by 303795(602) About Me  (Show Source):
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1/2 + 1 + 2 + 4 ...
Each term is twice the term before it so the common ratio is 2.
10 + 4 - 2 - 8 + ....
Find the common difference by subtracting each term from the term following.(eg subtract 10 from 4)
This gives a common difference of -6. Each term is 6 less than its predecessor.