Question

write down P(A) where A is a set {1,2,3}? ​

Answer 1

Answer:

ϕ,{1},{2},{3},{1,2},{2,3},{1,3} and {1,2,3}

Step-by-step explanation:

Let A={1,2,3}

Number of elements in A is 3

Hence n=3

Number of subsets of A=2

n

where n is the number of elements of the set A

=2

3

=8

The subsets of {1,2,3} are

ϕ,{1},{2},{3},{1,2},{2,3},{1,3} and {1,2,3}

Answer 2

Answer:

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