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Determine the set of all units modulo 28 and then state Euler’s Theorem for the modulus...

  1. Determine the set of all units modulo 28 and then state Euler’s Theorem for the modulus of 28. Moreover, find the least nonnegative residue of 52403 modulo 28
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Answer #1

The answers are:

If "a" is a unit of modulo "n", it implies that there exists a positive integer "b" modulo n such that,

a*b = 1 (modulo n)

These elements are particularly the coprime elements with "n".

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