Answer on Question #51202 – Math – Set Theory
Given that and , then one of these is untrue
a. T is a subset of S
b. T ⊆ S
c. S ≠ T
d. S ⊆ T
Solution
a. T is a subset of S. It means that S includes all elements of T. It is **true**, because S also has elements a, c and e.
b. T ⊆ S. It means that T is a subset of S. It is the same as case a. **True**.
c. S ≠ T. It means that S and T consist of different elements. It is **true**, because S has elements b and d, which are not elements of T.
d. S ⊆ T. It means that T includes all elements of S. It is **false**, because T doesn’t contain elements b and d.
Answer: d. S ⊆ T is not true.
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