Let A={1,2{3,4},5}.Then {phi} is not a subset of A.Why?

Asked by sidhusid | 20th Apr, 2010, 06:15: PM

Expert Answer:

phi the empty set is a subset of every set, true.

 but what you have written is {phi}

this is a set by itself and clearly not a subset of A.

Answered by  | 20th Apr, 2010, 10:21: PM

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