... = x 1x2 + x1 x + x1x2 = ( x + x1)x2 + x1 x = x2 + x1 x = x2 + x1 Vê dủ: f(x1, x2, x3) = x 1x2x3 + x1 x x + x1 x 2x3 + x1x2 x + x1x2x3 = x 1x2x3 + x1 x x + x1 x 2x3 + x1x2 ( x + x3) = x 1x2x3 + ... ta cọ: 2. 2 HM BOOLE V CẠC PHỈÅNG PHẠP BIÃØU DIÃÙN 2. 2.1 Hm Boole 2. 2.1.1 Âënh nghéa Hm Boole l mäüt ạnh xả Boole tỉì âải säú Boole vo chênh Tỉïc l ∀x, y ∈ B âỉåüc gi l biãún Boole thç hm Boole, ... hm Boole + f (x1, x2, , xn) Nãúu f1(x1, x2, , xn) v f2(x1, x2, , xn) l nhỉỵng hm Boole thç: + f1(x1, x2, , xn) + f2(x1, x2, , xn) cng l mäüt hm Boole cng l mäüt hm Boole + f1(x1, x2, , xn).f2(x1,...