Question

write the roster form of set A={x/x=prime numbers and x
$\leqslant$
21
​

Answer 1

Answer:-

A = {2,3,5,7,11,13,17,19,21}

plzz mark me as branlists❣️❣️❣️....

Answer 2

{2,3,5,7,11,13,17,19}

Step-by-step explanation:

A={x/x is a prime number and x less than or equal to 21}

Prime number: It is that number which have two factor 1 and itself.

For example: 2 is a prime number

Because 1 and 2 are two factors of 2.

The prime number less than or equal to 21 are

2,3,5,7,11,13,17,19

1 neither a prime number nor a composite number .

Therefore, the roster form ={2,3,5,7,11,13,17,19}

This is required roster form of set A.

#Learns more:

https://brainly.in/question/10527949:Answered by Parthyadav