Express the sum of the first terms of this sequence:

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- January 27th 2007, 02:42 PMSorobanQuickie #16

Express the sum of the first terms of this sequence:

- January 27th 2007, 05:46 PMgalactus
The sum of the first n terms is

For instance, sum of first term, n=1:

Sum of first 2 terms:

Sum of first 5 terms:

The terms are - January 28th 2007, 01:30 AManthmoo
- January 28th 2007, 07:24 AMSoroban
Good work, Galactus!

Here's my book's solution . . .

The term is: .

The sum is: .

. .

. .