[" 13.The sum "(3)/(1^(2))+(5)/(1^(2)+2^...

[" 13.The sum "(3)/(1^(2))+(5)/(1^(2)+2^(2))+(7)/(1^(2)+2^(2)+3^(2))+......" upto "11" -terms is: "],[[" (1) "(11)/(4)," (2) "(60)/(11)," (3) "(7)/(2)," (4) "(11)/(2)]]

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The sum of the series (3)/(1^(2))+(5)/(1^(2)+2^(2))+(7)/(1^(2)+2^(2)+3^(2))+...... upto n terms,is

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Sum of the n terms of the series (3)/(1^(2))+(5)/(1^(2)+2^(2))+(7)/(1^(2)+2^(2)+3^(3))+"......." is