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A binary operation * is defined on the s...

A binary operation * is defined on the set
`X=R-{-1}` by `x**y=x+y +xy, AA x, y in X`.
Check whether * is commutative and associative. Find its identity element and also find the inverse of each element of X.

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Let A=R xx R and be the binary operation on A defined by (a, b) *(c,d) = (a + c, b + d). Show that *is commutative and associative. Find the identity element for* on A, if any.

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MODERN PUBLICATION-TEST PAPER 6-EXERCISE
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