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If ""^((n+1))P(5): ""^(n)P(6)=2:7, find...

If `""^((n+1))P_(5): ""^(n)P_(6)=2:7`, find

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If ""^((n+1))P_(5): ""^(n)P_(5)=3:2 , find n

(i) If ""^(n)P_(4): ""^(n)P_(5)=1:2 , find n. (ii) If ""^(n-1)P_(3): ""^(n+1)P_(3)=5:12 , find n.

If ""^(2n-1)P_(n): ""^(2n+1)P_(n-1)=22:7 , find n.

If ""^(2n-1)P_(n): ""^(2n+1)P_(n-1)=22:7 , find n.

(i) If ""^(n)P_(5)=20xx""^(n)P_(3) , find n. (ii) If 16xx""^(n)P_(3)=13xx""^(n+1)P_(3) , find n. (iii) If ""^(2n)P_(3)=100xx""^(n)P_(2) , find n.

If ""^((n+2))C_(7):^((n-1))P_(4)=13:24 find n.

I : IF ""^(n+1) P_(5) : ""^(n)P_(5)=3:2 then n=14 . II . IF ""^(56)P_(r-6) : ""^(56)P_(r+3)=30800 : 1 then r= 41.

If ""^(n)P_(5)=""^(n)P_(6) then n is