2. Given the set m = {(x, y) | 2x+y = 2} and n = {(x, y) | x-2y = 8}, then m ∩ n = _ {()} _ _.

Is to find the intersection point and solve the equation yourself.

3. if "p: 3x+4 > 0 for any real number x", then p: _ _ x >; -4/3_______________

4.p: x is a multiple of 6, and q:x is a multiple of 2; Then p is a necessary and sufficient condition for q.