SOLUTION: Find the sum to n terms of the series:2+10+30+65+130+...

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Question 996147: Find the sum to n terms of the series:2+10+30+65+130+...
Found 2 solutions by 1136877, meng:
Answer by 1136877(1) About Me  (Show Source):
Answer by meng(2) About Me  (Show Source):