consider the set A={1, 2, 3, 4]. Find a proper subset B of A, then find a proper subset C of B, then find a proper subset D of C.
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Answer:
6
Step-by-step explanation:
A={1,2,{3,4}}
Number of elements in A,n=3.
Total number of subsets of A=2
n
=2
3
=8.
Except for set A and null set, all other sets are proper sets.
Hence number of proper subsets =8−2=6.
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