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n का मान बताओ यदि- (i) .^(n)P(5)=42.^(...

`n` का मान बताओ यदि-
(i) `.^(n)P_(5)=42.^(n)P_(3),ngt4` (ii) `13.^(n)P_(4)=17.^(n-1)P_(4)`
(iii) `.^(n)P_(3)=13.^(n)P_(2)` (iv) `16.^(n(P_(3)=13.^(n+1)P_(3)`

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