Question: 1) Show that 1 . 3 + 2 . 4 + 3 . 5 + ... + n(n + 2) = ()for any natural number

1) Show that 1 . 3 + 2 . 4 + 3 . 5 + ... + n(n + 2) = "(")for any natural number n. 6 2) Show that n3 - n + 3 is divisible by 3 for all natural numbers n

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