In this problem let * represent the operation x*y = abs(x+y).

a. Show that * is associative onN(natural numbers)

b. Show that * is not associative onZ(intergers)

c. Is * commutative onZ? Explain

d. Is 0 the identity for * inZ?

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- October 26th 2009, 09:28 AMtigergirlOperations 71.4
In this problem let * represent the operation x*y = abs(x+y).

a. Show that * is associative on**N**(natural numbers)

b. Show that * is not associative on**Z**(intergers)

c. Is * commutative on**Z**? Explain

d. Is 0 the identity for * in**Z**? - October 26th 2009, 09:38 AMPlato