SOLUTION: I need help... How can I find a sum of an infinite sequence if there is no common ratio? It is an alternating series, but no common ratio. Thank you.

Question 1093480: I need help...
How can I find a sum of an infinite sequence if there is no common ratio?
It is an alternating series, but no common ratio.
Thank you.
Answer by ikleyn(52790) (Show Source): You can put this solution on YOUR website!
.
If it is the geometric sequence, then it MUST have a common ratio.

If the sequence alternates signs, then the common ratio is NEGATIVE number.

Nobody in the school will ask you to find the sum of an infinite sequence, if it is not a geometric sequence.

The best way to ask for help to get the qualified help is to send your assignment written word-in-word as it is presented.

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The only one more idea is that your sequence is a mix of two geometric progressions.

But again, if you want to get the qualified help, then send your assignment written word-in-word as it is presented.

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