how do i tell if the following equations define a binary operation on Z?

a) m*n=(m+n)/2

b) m*n=mn^2

c) m*n=2^(mn)

d) m*n=sqrt(mn)

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- Sep 4th 2008, 03:40 PMmandy123binary operation
how do i tell if the following equations define a binary operation on Z?

a) m*n=(m+n)/2

b) m*n=mn^2

c) m*n=2^(mn)

d) m*n=sqrt(mn) - Sep 4th 2008, 03:48 PMThePerfectHacker