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[" If the sum of the first "15" terms of the series "],[[((3)/(4))^(3)+(1(1)/(2))^(3)+(2(1)/(4))^(3)+3^(3)+(3(3)/(4))^(3)+......" is equal to "],[" 225"k" then "k" is equal to: "],[[" (1) "108," (2) "27],[" (3) "54," (4) "9]]]

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