If A and B are two sets, then A∩(B∪A)c equals
If A and B are two given sets, then A∩(A∩B)c is equal to
If the sets A and B are defined as
A = {(x, y) : y=1x, 0 ≠ x ∈ R}
B = {(x, y) : y = -x, x ∈ R}, then