* 30. Let n and k be integers with 1 ≤ k ≤n. Show that n Σ() ( k=1 k n - 1) = (2n+2)/2 - (2n).

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* 30. Let n and k be integers with 1 ≤ k ≤n. Show that
n
Σ() (
k=1
k
n
-
1) = (2n+2)/2 - (2n).
Transcribed Image Text:* 30. Let n and k be integers with 1 ≤ k ≤n. Show that n Σ() ( k=1 k n - 1) = (2n+2)/2 - (2n).
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