Chris N.

asked • 07/10/21

Series and sequences

Suppose that (b_n) is a sequence of real numbers such that:

(b_n) = (17, -21, 4, -2, 1...) and lim of b_n as n approaches ∞ equals 4


Find s = ∞ ∑ n=1 (b_(n+1) − b_(n))

If the series does not converge, enter 'DNE'.

s=


for clarification: b_n = b subscript n

Mark M.

Check post for accuracy!
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07/10/21

Chris N.

I have updated the question with clarification, I wish we could post screenshots
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07/10/21

Mark M.

(b_n) = (17, -21, 4, -2, 1...) is neither arithmetic not geometric.
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07/10/21

Chris N.

I'm not really sure, this was a homework question and the answer is supposedly -13.
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07/10/21

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