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

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

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Trúc Chi 5 months 2021-08-27T15:27:59+00:00 1 Answers 1 views 0

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    2021-08-27T15:29:10+00:00

    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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