# hhhellllpp????????

• August 9th 2006, 06:24 AM
kodirl
hhhellllpp????????
Show that AuB=Bua for any sets A and B.......
• August 9th 2006, 06:51 AM
OReilly
Quote:

Originally Posted by kodirl
Show that AuB=Bua for any sets A and B.......

I have told you what you can use to prove that in similar your question.

Use Logic rules.
• August 9th 2006, 07:51 AM
ThePerfectHacker
Quote:

Originally Posted by kodirl
Show that AuB=Bua for any sets A and B.......

I recommend to show that,
$(A\cup B)\subseteq (B\cup A)$
$(B\cup A)\subseteq (A\cup B)$
Then,
$A=B$