F1(A,B,C,D)=∑m(0,2,3,5,7,8,10,13,15) F2(A,B,C,D)=∑m(0,2,7,8,10,15) F3(A,B,C,D)=∑m(3,5,10,11,13) CD000111/10 D000111 10Do0011110 B B 00 00 01 01 01 11 11 101 10 ①_1 F1=BD+BCD+BCD+ABCD F2=BD+BCD F3=ABCD+BCD+ABCF1 (A,B,C,D)=∑m(0,2,3,5,7,8,10,13,15) F2 (A,B,C,D)= ∑m(0,2,7,8,10,15) F3 (A,B,C,D)= ∑m(3,5,10,11,13)