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Virtate
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Can somebody please give me a hint as to how to do the following proof please? I have no idea what to use or where to start :(
Suppose that p is a prime and a is an integer which is not divisible by p. Prove that there exists an integer b such that ba is congruent to 1 mod p^2.
Thank you.
T
Suppose that p is a prime and a is an integer which is not divisible by p. Prove that there exists an integer b such that ba is congruent to 1 mod p^2.
Thank you.
T