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Find the value of n such that ""^nP5 = 4...

Find the value of n such that `""^nP_5 = 42 ""^nP_3,,n gt 4`.

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Find the value of n such that : "^nP_5=42 ^nP_3, n>4 .

Find the value of n such that : ('^nP_4)/("^(n-1)P_4)= 5/3, n>4 .

If ""^nP_4=5 ""^nP_3 , then n is :

Prove that : "^nP_n= 2^nP_(n-2) .

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Find the value of n , if ((n - 1)!)/(n!) = 1/9

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JBD PUBLICATION-PERMUTATIONS AND COMBINATIONS-EXAMPLE
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