Math Problem Statement
Exercice 14. Soient a1,...,an dans N∗ et bj = Πi̸=jai. Montrer que les ai sont premiers entre eux deux `a deux si et seulement si les bj sont premiers entre eux dans leur ensemble.
Solution
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Math Problem Analysis
Mathematical Concepts
Number Theory
GCD (Greatest Common Divisor)
Prime Numbers
Formulas
gcd(a_i, a_j) = 1
b_j = Π(i ≠ j) a_i
Theorems
Bézout's Identity
Properties of GCD
Suitable Grade Level
Undergraduate (Math Major)