Find all the permutation with the property P(j) != j, j in [1, m], 1 <=m<n

Hello! Could someone help me please with this one?

Be 1 <= m < n. Find all the permutations with the property P(j) != j, for any j in [1, m]
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I read this as P(j)≠j, for j∈[1,m] (and j must be an integer).

In words: find the permutation of j objects in which the number of permutations is not equal to j itself. Clearly, P(1)=1, P(2)=2, but when j>2, P(j)>j, so P(j)≠j for all j>2.

by Top Rated User (1.2m points)

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