Question

1.how empty set is subset of every set?
2. i've doubt in solving the proves of sets
for eg. P(A intersection B) = P(A) intersection P(B)??
any tip how to solve such types of question.

Answer 1

1. when u make power set of any given set then there is an element phi also i.e. an empty set...that's why every set has an empty set as its subset.
2. for these types of problems u can first make the Venn diagram so that u can get the idea...and practice more and more questions...