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9*. Determine all positive integers n for which (n 1)1 n2 + 2019(n 1) (n - 2)2 is an integer. (Hint: If k is an

9*. Determine all positive integers n for which (n 1)\"1 n2 + 2019(n 1) (n - 2)2 is an integer. (Hint: If k is an integer, than k + m is also an integer for a. given integer m.)

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