Question: Exercise 4. Let n E N. Prove that if n3 + 2n is divisible by 3 then (n +1)3+2(n+ 1) is also divisible by 3

Exercise 4. Let n E N. Prove that if n3 +

Exercise 4. Let n E N. Prove that if n3 + 2n is divisible by 3 then (n +1)3+2(n+ 1) is also divisible by 3

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