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[" If "Z" demotes set of all positive in...

[" If "Z" demotes set of all positive integers and if "f:N rarr N" is defined by "f(n)=],[" the sum of positive of "n" .then "f(2^(k)-3)" where "^(-)k'" is a positive integer is "],[[" 1) "2^(n-1)-1," 2) "2(2^(x+1)-1)," 3) "3(2^(k+1)-1)," 4) "4(2^(k+1)-1)]]

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