\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
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Consider the fraction \(f = \frac{a}{b}\). This fraction is
irreducible
if and only if:
\(a\) and \(b\) are coprime.
\(b\) is a prime number.
\(a\) is smaller than \(b\).
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