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The first part of the problem we take an object and break it down to four equal subset. Mathematical written as 1/4. The next step is to further divide each of the four subsets into four sub-subsets. That will give a total of sixteen sub sets of the whole. 1/4*1/4=1/16 or object divided into subset, subset, subset, subset and then each subset divided into sub-subset, sub-subset, sub-subset, sub-subset. Gives a total of sixteen sub-subset
{1,2,4.7} is a proper subset of {1, 2, 3, 4, 4.7, 5}
Proper subset definitionA proper subset of a set A is a subset of A that is not equal to A. In other words, if B is a proper subset of A, then all elements of B are in Abut A contains at least one element that is not in B.For example, if A={1,3,5} then B={1,5} is a proper subset of A. The set C={1,3,5} is a subset of A, but it is not a proper subset of A since C=A. The set D={1,4} is not even a subset of A, since 4 is not an element of A.
the difference between a subset and a proper subset
Since ASCII ⊊ unicode, I don't know if there are ASCII codes for subset and proper subset. There are Unicode characters for subset and proper subset though: Subset: ⊂, ⊂, ⊂ Subset (or equal): ⊆, ⊆, ⊆ Proper subset: ⊊, ⊊,