Let $A=\{1,2,\{3,4\}, 5\} .$ Which of the following statements are incorrect and why ?
$\{ 3,4\} \subset A$
Let $A=\{1,2,\{3,4\}, 5\} .$ Which of the following statements are incorrect and why ?
$\{ 3,4\} \subset A$
$A=\{1,2,\{3,4\}, 5\}$
The statement $\{ 3,4\} \subset A$ is incorrect because $3 \in\{3,4\}$; however, $3 \notin A$
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