... là phngf(x 1 ,x2)x 1 x20 1 0 1 fx 1 x2x30 1 00 01 11 10fx 1 x2x3x400 01 11 1000 01 11 10fx2x3x4x500 01 11 1000 01 11 10 10 11 01 00x 1 =0 x 1 =1 Chng 2. i ... f(x 1 ,x2,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 x4x3x2x 1 f(x 1 ,x2,x3,x4)x4x3x2x 1 f(x 1 ,x2,x3,x4)Vòng ... sau:f(x 1 ,x2,x3) =Π (0, 1, 2) + d(5, 6) 00 01 11 100 0 0 1 1 1 0 1 1 1 00 01 11 100 0 0 X 1 1 0 1 1 Xx 1 ,x2x3f(x 1 ,x2,x3) Vòng gom 2: x 1 + x2Vòng gom 1: x 1 + x3x 1 ,x2x3f(x 1 ,x2,x3)Chng...