Question

If A = {2, 5, 6, 8} and B = {2, 4, 6, 7}, find A − B and B− A.
Answer step by step

Answer 1

Answer:

A - B = {5, 8}

B - A = {4, 7}

Step-by-step explanation:

A = {2, 5, 6, 8} and B = {2, 4, 6, 7}

A - B means removing all the elements common in A and B from A.

A - B = {5, 8}

Here, 2 and 6 are removed from A as they are present in B too.

B - A means removing all the elements common in A and B from B.

B - A = {4, 7}

Here, 2 and 6 are removed from B as they are present in A too.

Answer 2

Answer:

The answers are {5,8} and {4,7} respectively

Step-by-step explanation:

Given $A=\{2,5,6,8\}$ and $B=\{2,4,6,7\}$

Therefore

       $A-B=\text{Elements of A which are not in B }=\{5,8\}$

And  $B-A=\text{Elements of B which are not in A }=\{4,7\}$