\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Let \(A, B, C \in \mathbb{K}[X]^*\). Show that if \(A \wedge C = 1\) and \(B \wedge C = 1\), then \((A B) \wedge C = 1\).
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