RELATIONS AND FUNCTIONS - NCERT
RELATIONS AND FUNCTIONS 3 (v) Given a binary operation * : A × A → A, with the identity element e in A, an element a ∈ A, is said to be invertible with respect to the operation *, if there exists an element b in A such that a * b = e = b * a and b is called the inverse of a and is denoted by a–1. 1.2 Solved Examples Short Answer (S.A.)
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