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13-03-2021
Mathematics

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Show that n(n – 1)(n + 1) + 6n ≡ n3 + 5n

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FancyBun FancyBun

13-03-2021

Answer:

Explanation:

n(n - 1)(n + 1) + 6n = n^3 + 5n
n(n^2 - 1) + 6n = n^3 + 5n
n^3 - n + 6n = n^3 + 5n
n^3 + 5n = n^3 + 5n (proven)

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