Question

Dado o conjunto A { x, y, w, z}, assinale a única relação, abaixo, que é Simétrica
a.
R = { (x,x), (x,y), (y,x), (y,y), (x,w), (w,x), (w,w,) (x,z), (z,x), (z,z)}
b.
R = { (x,x), (x,y), (y,x), (y,y), (w,x), (w,w,) (x,z), (z,w), (z,z) }
c.
R = { (x,x), (y,x), (y,y), (x,w), (w,x), (w,w,) (x,z), (z,z) }
d.
R = { (x,x), (x,y), (y,x), (y,y), (x,w), (w,x), (w,w,) (x,z), (z,w) }
e.
R = { (x,y), (y,x), (y,y), (w,x), (w,w,) (x,z), (z,w), (z,z) }

Answer 1

R= { (x,x), (y,x) , (y,y), (x,w), (w,x), (w,w), (x,z), (z,z), }