Question
Which of the following statements are correct/incorrect? $3 \subseteq(1,3,5) ; \quad 3 \in\{1,3,5\} ; \quad\{3\} \subseteq\{1,3,5\} ; \quad\{3\} \in\{1,3,5\} .$
Step 1
This statement is incorrect. The symbol "$\subseteq$" denotes a subset, meaning all elements of the first set are also elements of the second set. However, 3 is not a set, it is a single element. Therefore, it cannot be a subset of any set. Show more…
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