函数F = (A + B’)(C’ + D)(B’ + C) 的补码是:
(A) A’B + CD’ + BC’
(B) AB’ + C’D + B’C
(C) AB’ + CD’ + BC
(D) AB + BC + CD答案:(一)
说明:使用德摩根定律(断线,改变符号)
的补充
F = F’ = ((A + B’)(C’ + D)(B’ + C))’
F’ = ((A + B’))’ + ((C’ + D))’ + ((B’ + C))’
F’ = A’B + CD’ + BC’
这个问题的测验