The Total solution for NCERT class 6-12
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Answer - 14 : -
Let S bethe set of all rational numbers except 1 and ∗ be defined on S bya ∗ b = a + b - ab,for all a, b ∊ s.
Prove that:
(i) ∗ is a binary operation on S
(ii) ∗ is commutativeas well as associative.
Answer - 15 : -