SOLUTION: Find the arithmetic mean an of an-1 = 3.9, an+1 = 7.1

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Question 634459: Find the arithmetic mean an of an-1 = 3.9, an+1 = 7.1
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
((an-1) + (an+1))/2

(3.9+7.1)/2

5.5