1) A V (B V !B & !C) = A V (B V !B) & (B V !C) =A V 1 & (B V !C) = A V B V !C
2) A & (B & !B => !C) = A & (0 => !C) = A &1 = A
3) A V (B V !B) & A V (B=>C) = A V 1 & A V (B=>C) = A V A V (B=>C) = A V (B=>C) =
= A V !B V C
Буду благодарна, если отметите