Let A be the set of x|x positive divisor of 18:
A= {2,3,6,9,18}
1 1 1
would you tell me how you answer that set problem? please
You'll just find the possible positive divisor of 18 and make a set out of it.
I will ask you again what is the roster form of A={x3 -2 I x E N; 1< x <3}