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Find r if : ^10Pr=2. ^9Pr...

Find r if : `^10P_r=2. ^9P_r`

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Find r if : .^(10)P_r=2. ^9P_r

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Find r if "^5P_r =2 "^6P_(r-1) .

Find r if (i) ""^5P_r=2^6P_(r-1) (ii) ""^5P_r=^6P_(r-1)

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Find r if : ^10P_(r+1): "^11 P_(r)= 30:11 .

Find r if "^5P_r = "^6P_(r-1) .

Find r if .^(5)P_(r )=2 .^(6)P_(r-1)

Find r if (i) .^(5)P_(r) = 2 .^(6)P_(r-1) (ii) .^(5)P_(r) =^(6)P_(r-1) .

Find r if .^(5)P_(r )= .^(6)P_(r-1)