Question: 3. Prove that a- n-1 is always a solution to a2-1 mod n . (10pts) 3. Prove that a=n-l is always a solution to a2=1

3. Prove that a- n-1 is always a solution to a2-1 mod n . (10pts)
3. Prove that a=n-l is always a solution to a2=1 mod n. (10pts)
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