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" (ii) "22p(r+1):20p(8+2)=11:52...

" (ii) "22p_(r+1):20p_(8+2)=11:52

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If ""^(22)P_(r+1):^(20)P_(r+2)=11:52, find r.

If 22P_(r+1):^(20)P_(r+2)=11 : 52 ,find r

If 22P_(r+1):^(20)P_(r+2)=11:52, find r

If ""^(22)P_(r+1):""^(20)P_(r+2)=11:52, find r.

(a) If .^(22)P_(r+1):^(20)P_(r+2)=11 : 52 , find r. (b) If .^(56)P_(r+6):^(54)P_(r+3)=30800: 1 , find r.

(a) If .^(22)P_(r+1):^(20)P_(r+2)=11 : 52 , find r. (b) If .^(56)P_(r+6):^(54)P_(r+3)=30800: 1 , find r.

If ^(22)P_(r+1) : ^(20)P_(r+2)=11 : 52 ,find r

(i) If ""^(5)P_(r)=2xx""^(6)P_(r-1) , find r. (ii) If ""^(20)P_(r)=13xx""^(20)P_(r-1) , find r. (iii) If ""^(11)P_(r)=""^(12)P_(r-1) , find r.

IF ""^(20)P_(r):""^(20)P_(r-1)=15 :1 then r=