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

Asked by sidhusid 20th April 2010, 6:15 PM
Answered by 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 Expert 20th April 2010, 10:21 PM
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