Question

Determine the following:
U= {a,b,c,d,e,f,g,h,i,j,k}
A= {a,c,d,f,g,i}
B= {b,c,d,f,g}
C= {a,b,f,i,j}
A' U B'= {a,c,d,f,g,i} U {b,c,d,f,g}
={c,d,f,g}
What did I do wrong?

Answer 1

hmmm, looks like you did intersection, not union

Answer 2

or am I misunderstanding?

Answer 3

union would list the members from each set, not the ones that are in both

Answer 4

http://en.wikipedia.org/wiki/Union_(set_theory)

Answer 5

i.e. {a,b,c,d,f,g,i}