Verify the property: by taking:
(i)
(ii)
(iii)
(iv)
(i) We have,
x * y = * (
)
=
y * x = * (
)
=
(ii) We have,
x * y = * (
)
=
y * x = * (
)
=
(iii) We have,
x * y = 2 * ()
= =
y * x = * 2
= =
(iv) We have,
x * y = 0 * ()
= 0
y * x = * 0
= 0