Question

if A={1,2,3,4,5};B={4,5,6,7} then find A-B and B-A . Are they equal?​

Answer 1

Answer:

A - B means the numbers which are in A but not in B.

B - A means the numbers which are in B but not in A.

∴ A = {1, 2, 3}

B = {6, 7}

∴ It is clearly seen that: (A - B) ≠ (B - A).