Question

If the sets A and B are defined as:

A = { (x,y) : y = 1/x, x ≠ 0, x ∈ R };
B = { (x,y) : y = -x, x ∈ R }

Then,
(a) A∩B = A
(b) A∩B = B
(c) A∩B = Ф
(d) None of these

Answer 1

A -----> (1,1) ; (2,1/2) and so on
B -----> (1,-1) ; (2,-2) and so on
therefore a intersection b is phi

Answer 2

A n B is phi. no common.