Question

answer question 4 fastly​

Answer 1

Solution:

S = {x:x is a positive integer }

S = {1,2,3,4 ,....}

A={x:x is an integer less than 3}

A = { 1,2 }

n(A) = 2

Proper subsets of A = 2² - 1

= 4 -1

= 3

Subsets of A = {1}, {2}, { }

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