P(6,6)=,?, Find the permutation



P(6,6)=,?, Find the permutation​

P(6,6) = 6!

P(n,r)

when n = r

just get n!

P(6,6) = 6!

P(6,6) = 6×5×4×3×2×1

P(6,6) = 720


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