Answer to Question #266303 in Discrete Mathematics for Bjoy

Question

A. Rewrite the following statements using proper set notation.

1. x is a member of A

2. d is not an element of E

3. M and N are equal sets

4. B is the set of all x such that x squared is equal to 9

5. J is a subset of K

Answer 1

1) $x\in A$

2) $d\not\in E$

3) $M=N$

4) $B=\{x\in\mathbb{R}|x^2=9\}=\{3,-3\}$

5) $J\subset K$