Question

If x= xx is a factor of 42); B = (x:x is a factor of 54)
Then find AUB, AB, 4-B and B-A.


please tell me answer​

Answer 1

Answer:

Answer

(i) Factors of 12 are 1,2,3,4,6,12. So, the prime factors of 12 are 2,3.

We write the set A in roster form as A={2,3} and hence n(A)=2.

(ii) B={x:x∈W,x≤5}. In Tabular form, B={0,1,2,3,4,5}.

The set B has six elements and hence n(B)=6