Try to note how to determine the following subset:
A = {1}, the number of subsets of A is 2, namely {1} and ∅.
B = {1,2}, the number of subsets of B is 4, namely {1}, {2}, {1,2}, and ∅.
C = {1,2, 3}, the number of subsets of C there are 8, namely {1}, {2}, {3}, {1,2}, {1, 3}, {2, 3}, { 1, 2, 3}, and ∅.
If you pay attention to the above, you get the following statement:
If n(A) = 1, then many sets are 2 = 21.
If n(B) = 2, then many of the subsets are 4 = 22 If n(C) = 3, then many sets of parts are 8 = 23
In this way, it can be concluded as follows:
If many members of set A are n and many subsets of A are N then N = 2
n.
Thus this article. Sorry if there is a mistake.
Final words wassalamualaikum wr. wb.
Reference:
- The book Berlogika with mathematics (Umi Salamah)
Sumber http://matematikaakuntansi.blogspot.com
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