Let and be an into function such that

MATHEMATICS · Single correct · CBSE · Mathematics · Relations and Functions · Relations and Functions

Problem

Let A={1,2,3,4,5}A = \{1, 2, 3, 4, 5\} and f:A→Af: A \to A be an into function such that f(i)≠i,∀i∈Af(i) \neq i, \forall i \in A , then number of such functions ff are (1) 1024 (2) 904 (3) 980 (4) None of these

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