If $A = \{x : x = 2n,\ n \in \mathbb{N},\ n \le 4\}$, then in roster form $A$ equals

If $A = \{x : x = 2n,\ n \in \mathbb{N},\ n \le 4\}$, then in roster form $A$ equals
  1. $\{2, 4, 6, 8\}$
  2. $\{1, 2, 3, 4\}$
  3. $\{2, 4, 6, 8, 10\}$
  4. $\{0, 2, 4, 6, 8\}$

Solution

For $n = 1,2,3,4$: $2n = 2, 4, 6, 8$.

Asked in: MH-SSC-9

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