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If ""^(56)P((r+6)):""^(54)P((r+3))=30800...

If `""^(56)P_((r+6)):""^(54)P_((r+3))=30800:1`, find r.

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If ""^(56)P_(r+6)" : ""^(54)P_(r+3) = 30800 :1 , then the value of r is

If ""^(56)P_(r+6):""^(54)P_(r+3)=30800:1 , then the value of r is

If ""^(56)P_(r+6) : ""^(54)P_(r+3)= 30800, then r is

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 "^56P_(r+6) : "^54P_(r+3) = 30800 : 1, the r =