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[12Y] Prerequisites:[124].In the following \(A,B,\hat Bββ^ n\).
Find an example where \(B\stackrel{β }{β}\hat B\) and \(A β B\stackrel{β }{β} A β \hat B\).
Find an example where \(B\stackrel{β }{β}\hat B\) and \(A β \hat B\stackrel{β }{β} A β B\).
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