Question: Prove that there exist infinitely many composite number n for which a-1 = a(mod n) (04) (04) Find an integer having remainders 2, 3,

Prove that there exist infinitely many composite number n for which a-1

Prove that there exist infinitely many composite number n for which a-1 = a(mod n) (04) (04) Find an integer having remainders 2, 3, 4, 5 when divided by 3,4,5,6, respectively Find all solutions of the linear congruence 3x-7y= 11(mod13) (04)

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