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  3. (a) let a,b,c?z. prove that if gcd(a,b)=1 and a?bc

(A) Let a,b,c?Z. Prove that if gcd(a,b)=1 and a?bc, then a?c. (B) Let p ? 2. Prove...

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Question

Advance Math

(A) Let a,b,c?Z. Prove that if gcd(a,b)=1 and a?bc, thena?c.

(B) Let p ? 2. Prove that if 2p?1 is prime, then pmust also be prime.

(Abstract Algebra)

Answer & Explanation Solved by verified expert
4.4 Ratings (951 Votes)
ALet and suppose that andandmultiply above equation by c nowBLet is prime If    See Answer
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