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Let M={((x,x),(x,x)) : x != 0 , x in R}...

Let `M={((x,x),(x,x))` : `x != 0 , x in R}` Let * be an operation on M defined by A * B=AB (i)Prove that * is binary (ii) Check whether is commutative and associative (ii) Find the identity element if any.

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