Question

X = { 10,20,30} write it on set- builder form ​

Answer 1

Answer:

X ={x:x belong to N ; 10>=x<=30}

Step-by-step explanation:

please mark me as brainliest

Answer 2

Answer:

X = {x | x is a decade number and 10 < or = x < or = 30}

Step-by-step explanation:

Actually you can see that X = { 10,20,30} and the elements are all decade numbers and it ranges between 10 to 30 so I have written this answer.

But it can be mistaken if set theory doesn't accept decade word.