Question

if v={1,2,3,4...} and A={2,4,6,8...} then A=? .​

Answer 1

Answer:

A∩B={2,4}  

A∩B⊆{1,2,4},{3,2,4},{6,2,4},{1,3,2,4},{1,6,2,4},{6,3,2,4},{2,4}{1,3,6,2,4}⊆A∪B

⇒n(C)=8