推 Madroach :沒記錯的話似乎是某校的考古題 01/16 22:17
這次考試這幾題考倒我了~~~
不知道要怎麼
希望有人能幫幫我!!
(a)Is it true that int(A) ∪int(B) = int(A ∪B)??
(b) Is it true that int(A) ∩ int(B) = int(A ∩ B)??
(c) Is it true that int(cl(A)) = int(A)?
(d) Is it true that cl(A) ∩ A = A?
(e) Is it true that cl(int(A)) = A?
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 111.252.161.247