# UNION and INTERSECTION of sets A and B

Let : U = {1, 2, 3, 4, 5, 6, 7, 8}
A = {1, 2, 4, 5, 8}
B = {2, 3, 4, 6}

Solve
A ¾ BŒ

### Comments for UNION and INTERSECTION of sets A and B

 Nov 12, 2010 Algebra – Sets by: Staff The question: Let : U = {1, 2, 3, 4, 5, 6, 7, 8} A = {1, 2, 4, 5, 8} B = {2, 3, 4, 6} Solve A ¾ BŒ The answer: Your mathematical symbols did not display properly on my FireFox or IE browsers, so I can’t be certain of what you are asking. Not all special characters can be displayed in all fonts. I assume you want to know the results of the UNION and INTERSECTION of sets A and B. Both set A and set B are proper subsets of the set U. A ⊂ U B ⊂ U The UNION of sets A and B is: A U B = {1, 2, 3, 4, 5, 6, 8} (notice the 7 is missing) The INTERSECTION of sets A and B is: A ∩ B = {2, 4} (the 2 and 4 are the only numbers that sets A and B have in common) The following symbols can be displayed on your computer screen in Microsoft word, but may not display on an internet browser: The symbol for a UNION of sets is a U: ∪. [The number lock key must be on. To type this symbol on your keyboard, press and hold down the ALT key and type 8746 on the numerical key pad, then release alt key] See: http://www.solving-math-problems.com/math-symbols-set-union.html The symbol for the INTERSECTION of sets is an upside-down U: ∩. [The number lock key must be on. To type this symbol on your keyboard, press and hold down the ALT key and type 239 (or ALT + 8745) on the numerical key pad, then release alt key] See: http://www.solving-math-problems.com/math-symbols-set-intersection.html The symbol for a SUBSET of a set is a U, lying on its side: ⊂ [The number lock key must be on. To type this symbol on your keyboard, press and hold down the ALT key and type 8834 on the numerical key pad, then release alt key] See: http://www.solving-math-problems.com/math-symbols-subset-proper-1-left.html Thanks for writing. Staff www.solving-math-problems.com