Let n, r e N with r <= n . Prove the following identities:

Saluran Edukasion 2024-04-18T08:27:00

Let n, r e N with r <= n . Prove the following identities: n P r = (n-r+1) n P r-1
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Let n, r e N with r <= n . Prove the following identities: n P r = (n-r+1) n P r-1