Question

Find the sum to infinity of 9+3+1+...​

Answer 1

Answer:

An arithmetic sequence can also be defined recursively by the formulas a1 = c, an+1 = an + d, in which d is again the common difference between consecutive terms, and c is a constant. The sum of an infinite arithmetic sequence is either ∞, if d > 0, or - ∞, if d < 0...

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Answer 2

answer is Infinitity.