Question: Hi, I need help with the questions below. Please answer these questions clearly, Thanks. 1.6 Prove that 9 divides n3n1)3(n 2)3, for every integer n

Hi, I need help with the questions below. Please answer these questions clearly, Thanks.

Hi, I need help with the questions below. Please answer these questions

1.6 Prove that 9 divides n3n1)3(n 2)3, for every integer n 20. 1.7 Prove that in any set of n 1 numbers from 1,2,... . 2n), there are alwavs two numbers that are consecutive

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