Question

Given, A={2,3,4}, B ={2,5,6,7}. Construct an example of each of the following
(iii) a mapping from B to A.

Answer 1

Given that, A={2,3,4}. B={2,5,6,7}
(iii)Let $hB\to A$ denote a mapping such that h={(2,2),(5,3),(6,4),(7,4)}, which is not an mapping from B to A.