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" If "^(10)P(r)=5040" then "r=...

" If "^(10)P_(r)=5040" then "r=

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(i) If ""^(15)P_(r)=2730, find the value of r. (ii) If ""^(10)P_(r)=5040, find the value of r.

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If .^(10)P_(r) =5040 , find the value of r

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If \ ^(10)P_r=5040 find the value of rdot

If \ ^(10)P_r=5040 find the value of rdot

If ""^(n)P_(r)=5040 and ""^(n)C_(r)=210, find n and r.

If ""^(n)P_(r)=5040 and ""^(n)C_(r)=210 , find n and r.