Question: or any integer n , define Sn = { nx | x in Z } as before. For any integers a , b , and

or any integer n, define Sn ={nx | x in Z} as before. For any integers a, b, and n,
if ab / in Sn, then neither a nor b is a member of Sn.
Hint: Dont try to prove the two conclusions using the same proof by contradiction
subproof. Youll want two separate (but very similar) subproofs for this.

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