# Elements

• December 9th 2008, 04:42 PM
Tazsweet19
Elements
1. Let U: = {1,2,3,4,5,6,7,8,9} be the universal set. Let A:= {1,4,5}, B:= {4,5,7}, C: {3,5,8,9}.

a) list the elements of A^c
b) list the elements of A – B -> answer A{1,4,5} - B{4,5,7} = {1,7}
c) list the elements of B U C -> answer B{4,5,7} U C{3,5,8,9} = {3,4,7,8,9}
d) list the elements of A^c B^c
e) list the elements of A B C. -> answer A{1,4,5} B {4,5,7} C {3,5,8,9} = {1,3,7,8,9}
• December 9th 2008, 04:49 PM
Plato
Quote:

Originally Posted by Tazsweet19
1. Let U: = {1,2,3,4,5,6,7,8,9} be the universal set. Let A:= {1,4,5}, B:= {4,5,7}, C: {3,5,8,9}.

a) list the elements of A^c
b) list the elements of A – B -> answer A{1,4,5} - B{4,5,7} = {1,7}
c) list the elements of B U C -> answer B{4,5,7} U C{3,5,8,9} = {3,4,7,8,9}
d) list the elements of A^c B^c
e) list the elements of A B C. -> answer A{1,4,5} B {4,5,7} C {3,5,8,9} = {1,3,7,8,9}

2) Use the binomial theorem to prove that $E 2n k=0 (2n/k) = 4^n$. b) write out the expansion 7x + 10y =1.

Sorry, but can you tell us the point of your posting?
• December 9th 2008, 04:52 PM
Tazsweet19
huh.. my teacher gave me question. I want to know.. I put answer if I am right or wrong? I need study for final exam.