Question

Is anyone good at set operations. I just started finite math in college and I am lost on the first day. For example one problem is:

Let U= {1,3,5,6,7}, A= {1,6}, B= {3,5}. In each of the following questions, find the indicated set; give your answer in list form i.e., the way that U, A, and B are given (remember to give braces). To indicate that a set is empty, write down the braces with nothing inside them i.e. {}
(1) Find A'
A'=__________________
(2) Find A' n B'
A' n B' =____________________
(3) Find A u B
A u B =_____________________
Note: 3 more to find on other post

Answer 1

\[A^'\] is everything in U that is not in A

Answer 2

so list the elements of U except for 1 and 6

Answer 3

in order to find
\[A^'\cap B'\] first you will need to find
\[B'\]

Answer 4

\[B'=\{1,6,7\}\] and then
\[A^'\cap B'\] will be anything that is in A' AND in B'

Answer 5

and finally
\[A\cup B\] is anything that is in A OR in B so list everything you see in A and everything in B

Answer 6

let me know if this is not clear

Answer 7

very clear it is a lot easier than i am making it to be I believe. I just have scattered notes and no text book yet thank you so much

Answer 8

a textbook will help, but there are also tons of recourses on the web for this stuff

Answer 9

any off the top of your head?

Answer 10

give me a second. once you get to venn diagrams (if you have not already) there are nice applets there you can try

Answer 11

here are some for venn diagrams
http://nlvm.usu.edu/en/nav/frames_asid_153_g_3_t_1.html
http://www.shodor.org/interactivate/activities/ShapeSorter/
http://math.uww.edu/faculty/mcfarlat/143venn.htm

Answer 12

justmathtutoring has easy to understand videos on set theory as well
you have to scroll down a bit
http://justmathtutoring.com/