Write the following set in roster (Tabular) form :
A5 = {x : x = 4n, n ∈ W and n < 4}
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When n = 0
⇒ x = 4 x 0 = 0
When n = 1
⇒ x = 4 x 1 = 4
When n = 2
⇒ x = 4 x 2 = 8
When n = 3
⇒ x = 4 x 3 = 12
A5 = {0, 4, 8, 12}
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A3 = {x : x ∈ Z, -3 ≤ x < 4}
A4 = {x : x is a two digit number and sum of the digits of x is 7 }
Write the following set in set-builder (Rule Method) form :
B1 = {6, 9, 12, 15, …………… }