... phngf(x 1 ,x 2 )x 1 x 2 0 1 0 1 fx 1 x 2 x30 1 00 01 11 10fx 1 x 2 x3x400 01 11 1000 01 11 10fx 2 x3x4x500 01 11 1000 01 11 10 10 11 01 00x 1 =0 x 1 =1 Bài ging N T S 1 ... 1: x 1 Vòng gom 2: x4y: f(x 1 ,x 2 ,x3,x4) =x 1 + x400 01 11 1000X X 1 X 01 X 0 1 X 11 0 X X 1 10 1 1 X 1 00 01 11 1000X X 1 X 01 X 0 1 X 11 0 X X 1 10 1 1 X 1 x4x3x 2 x 1 f(x 1 ,x 2 ,x3,x4)x4x3x 2 x 1 f(x 1 ,x 2 ,x3,x4)Vòng ... tc 1 ta có:f(x 1 ,x 2 ) = f(0,0).x 1 x 2 + f(0 ,1) .x 1 .x 2 + f (1, 0).x 1 .x 2 + f (1, 1).x 1 .x 2 = 0.x 1 x 2 + 1. x 1 .x 2 + 1. x 1 .x 2 + 1. x 1 .x 2 =x 1 .x 2 + x 1 .x 2 + x 1 .x 2 Nhn...