【正确答案】(1) Y
l (A，B，C)＝AB+BC+AC
＝A'BC十AB'C+ABC'+ABC
表 A2.11(a) Y1的真值表 |
A B C | Y1 | A B C | Y1 | 0 0 0 | 0 | 1 0 0 | 0 | 0 0 1 | 0 | 1 0 1 | 1 | 0 1 0 | 0 | 1 1 0 | 1 | 0 1 1 | 1 | 1 1 1 | 1 | |
(2) Y
2 (A，B，C，D)＝A'B'+BCD+C'D'
＝A'B'C'D'+A'B'C'D+A'B'CD'+A'B'CD+A'BC'D'
+A'BCD+AB'C'D'+ABC'D'+ABCD
表 A2.11(b) Y2的真值表 |
A B C D | Y2 | A B C D | Y2 | 0 0 0 0 | 1 | 1 0 0 0 | 1 | 0 0 0 1 | 1 | 1 0 0 1 | 0 | 0 0 1 0 | 1 | 1 0 1 0 | 0 | 0 0 1 1 | 1 | 1 0 1 1 | 0 | 0 1 0 0 | 1 | 1 1 0 0 | 1 | 0 1 0 1 | 0 | 1 1 0 1 | 0 | 0 1 1 0 | 0 | 1 1 1 0 | 0 | 0 1 1 1 | 1 | 1 1 1 1 | 1 | |