Consider the following equivalence proof for proving: А — ВлС%3 (А — В) л (А — С) The proof has a mistake in it. Which line contains the error? 1. А — ВЛС = ¬A V (B A C) = (¬A A B) V (¬A ^ C) 2. 3. 4. — (А — В) л (А — С) 1 2 4

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