简化这个步骤是什么（a + b）（a +！b）= a

Question

简化此操作的步骤是什么（a + b）（a +！b）= a

Answer 1

  (a + b).(a + !b)

= a.(b + !b)          ; distributivity [1]

= a.1                 ; complements [1]

= a

1. 请参阅Wikipedia page on Boolean algebra