Fsc Part 1 Mathematics (Complete Solution)

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Q7

Which of the following sentences are true and which of them are false?

**(i) {1,2} = {2,1}**

Ans: Since the sets are independent of order ,so it is True.

**(ii) Φ ⊆ {{a}}**

Ans:Since empty set is a subset of every set, so it is True.

**(iii) {a} ⊆{{a}}**

Ans: Since {a} is an element of {{a}}, so it is false

**(iv) {a}∈{{a}}**

Ans:Since {a} is a member of {{a}}, so it is True.

**(v) a∈{{a}}**

Ans:Since {a} is not an element of {{a}},so it is false

**(vi) Φ∈{{a}}**

Ans: Since Φ is not an element {{a}},so it is false