Question

determine the sets A and B given that A-B ={1,3,7,11} B-A={2,6,8} and AnB ={4,9}

Answer 1

Answer:

sorry but I could not find the ans

Answer 2

Answer:

A={1,3,7,11,4,9}

B={2,6,8,4,9} .

Step-by-step explanation:

A-B takes all elements of A and removes all elements that are in both A and B.

B-A takes all elements of A and removes all elements that are in both A and B.

So just add in the elements that are in both A and B, ie  A∩B={4,9}  to A-B to get A, and to B-A to get B.

So  A=A−B+(A∩B)={1,3,7,11}+{4,9}={1,3,7,11,4,9}  and  B=B−A+(A∩B)={2,6,8}+{4,9}={2,6,8,4,9} .