set e is a proper subset of d
Step-by-step explanation:
set E is a proper subset of D and if only all element in E is in D,but at least one element in E is not D.
Given:
set E={1,2,3,4,5,}
A={1,2,5}
E is a proper subset of D
The element of E are 1,2 and 3.All of it are also in D,but there are two elements in D not in E.At this element are 3 and 4.
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