Question

Roster form of {3,6,9,12}​

Answer 1

Step-by-step explanation:

there are two methods to represent a set.

(1) set - builder form and (2) roaster form.

\textbf{set-builder form}set-builder form : when the collection of objects of a set is represented by using its properties is known as set builder form. for example : A = {1,2, 3, 4, 5} is given then we can write A in set builder form of A = {x : x is a natural number less than 6}.

here, Let r = {3, 6, 9, 12}

here r is set of all positive integral multiple of 3 less than and equal to 12.

so, we can write r, in set - builder form

r = { x : x = 3n , n \in∈ N, 1 ≤ n ≤ 4}

Answer 2

Answer:

$\huge{\fbox{\fbox{\pink{\mathcal{Your\:answer}}}}}$

Roster form - { 3,6,9,12 }

Set builder form - { x : 3x ; X is greater than and equal to 1 and less than and equal to 4 ; x belongs to the set of real numbers (R) }

Thank you ☺️✌️..