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December 4

How much is this

\sum_{k = 0}^{n} (- 1)^{k}

37.162.46.235 (talk) 11:00, 4 December 2024 (UTC)

1 for n even, 0 for n odd. For

n \to \infty

see Grandi's series. --Wrongfilter (talk) 11:18, 4 December 2024 (UTC)

I hope this is not homework. Note that (for finite

n

) this is a finite geometric series. --Lambiam 21:51, 4 December 2024 (UTC)