1.

Let **' be the binary operation on N given by a**'b= L.c.m. of a and b. Is ** commutative ?

Answer»

SOLUTION :`a**B`=L.c.m. of a and b
= L.c.m of b and a
=`b**a` for all `a,b in N`
`THEREFORE **` is COMMUTATIVE


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