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Kenneth Rosen Edition 7 Exercise 2.1 Question 7 (Page No. 125)

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For each of the following sets, determine whether 2 is an element of that set.

  1. $\{ x \in R  \mid x \text{ is an integer greater than} \}$
  2. $\{x \in R \mid x \text{ is the square of an integer}\}$
  3. $\{ 2 ,\{ 2 \}\}$
  4. $\{\{ 2\},\{\{ 2 \}\}\}$
  5. $\{\{2 \},\{2,\{2 \}\}\}$
  6. $\{\{\{2\}\}\}$
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