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10. Let a and b be natural numbers that are co-prime. Prove that (b-a) and b must also be co-prime. han C: oadl Prove that if
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voy ab are cobrine, i.e. ged (,b) = 1 * aut bv=1 (for some integers a &V) = (-a) Eu) + bv = 1 :> (b-a) E-w) + b[u+v) = 1 * ge

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