Question 916201



Write down A∪B for the following sets

The union of two sets {{{A}}} and {{{B}}} is the set of elements in {{{A}}} or {{{B }}}(or both).

a. 

if A={1,3,5} and B={2,4,6}, then A∪B={1,2,3,4,5,6}

b. 

if A={1,3,5} and B={2,3,4}, then  A∪B={1,2,3,4,5}



Write down A∩B for the following sets

The intersection of two sets {{{A}}} and {{{B}}} is the set of elements common to both {{{A}}} and {{{B}}}


a. 

if A={1,3,5} and B={2,4,6}, then A∩B={} (there are no elements common to both {{{A}}} and {{{B}}})

b. 

if A={1,3,5} and B={2,3,4}, then A∩B={3}


since you have no textbook, visit this websites:

http://www.purplemath.com/modules/setnotn.htm

http://www.mathsisfun.com/sets/sets-introduction.html