Find the value of n such that
` "(i) "^(n)P_(5) =42 xx ""^(n)P_(3), n gt 4 " (ii) "(""^(n)P_(4))/(" "^(n-1)P_(4))=(5)/(3), n gt 4.`

Explanation

To solve the given problems, we will use the formula for permutations, which is defined as:

\[ nPr = \frac{n!}{(n-r)!} \]

where \( n! \) is the factorial of \( n \).

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