(A u B) n (A u C) = A n (B u C)这个命题是真命题吗?

问题描述:

(A u B) n (A u C) = A n (B u C)这个命题是真命题吗?
我已经知道了,(A u B) n (A u C) = A u (B n C)

不是. 应该是(A u B) n (A u B) =A u (B n C)