Determine which of the following binary ...

Determine which of the following binary operations on the set N are associative and which are commutative. (a) `( b ) (c) ab" "=" 1"AA a ," "b in N (d)` (e) (b) `( f ) (g) ab=( h )(( i )(a+b)/( j )2( k ) (l)AAa , b in N (m)` (n)

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Determine which of the following binary operations on the set N are associative and which are commutative. (a) `( b ) (c) ab" "=" 1"AA a ," "b in N (d)` (e) (b) `( f ) (g) ab=( h )(( i )(a+b)/( j )2( k ) (l)AAa , b in N (m)` (n)