Question

Q = {x:x = 2n, n Ɛ N and n < 6} and R = {4, 6, 8, 9, 10, 12} Express in roster form​

Answer 1

1. Q = {x:x = 2n, n Ɛ N and n < 6}

Roster form of Q:

Q = { 2,4,6,8,10}

Explanation:

1. If n = 1 then x = 2× 1 = 2
2. If n = 2 then x = 2× 2 = 4
3. If n = 3 then x = 2× 3 = 6
4. If n = 4 then x = 2× 4 = 8
5. If n = 5 then x = 2× 5 = 10

2. R = {4, 6, 8, 9, 10, 12}

Set builder form:

R = { x : x = 2n , n€ N and 2 ≤ n ≤ 6 }

•••♪