129,770 views
27 votes
27 votes
List the first three elements of the set
x

User Thuan
by
2.8k points

2 Answers

19 votes
19 votes

Answer:


x \in \{3, 6, 9 \}

Explanation:

Given:


\ x = 3n, n \in \mathbb N \

The first three elements of the given set are just the values of
x when
n = 1, 2, 3.

Solving for
x when
n = 1:


x = 3n \\ x = 3(1) \\ x = 3

Solving for
x when
n = 2:


x = 3n \\ x = 3(2) \\ x = 6

Solving for
x when
n = 3:


x = 3n \\ x = 3(3) \\ x = 9

User FitzFish
by
3.0k points
24 votes
24 votes

Answer:

{3,6,9}

Step-by-step explanation:

first element = 3×1

second element = 3×2

third element = 3×3

Explanation:

User Zrooda
by
2.5k points