Hi!

Could you help me with this assignment?

What is the sum of first elements of the sequence where:

?

Thanks.

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- October 12th 2011, 10:40 AMgollumSequence, sum of elements
Hi!

Could you help me with this assignment?

What is the sum of first elements of the sequence where:

?

Thanks. - November 4th 2011, 11:54 AMveileenRe: Sequence, sum of elements
First you should have tried to find a formula for . It's easy to observe that:

Now that you "know" it's simpler to calculate the sum:

Pretty clear I hope...