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Question
Let A = {a, b, {c, d}, e}. Which of the following statement are false and why?
\[\phi \in A\]
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Solution
A = {a, b, {c, d}, e}
False
\[\phi\] is an empty set; in other words, this set has no element. It is denoted by \[\phi\] Therefore, the correct statement would be \[\phi\]
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