If `Sigma_(r=1)^(50) (2)/(r^2+(11-r^2))`, then the value of n is _____ – InterviewSolution

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1.	If `Sigma_(r=1)^(50) (2)/(r^2+(11-r^2))`, then the value of n is __________
Answer» Correct Answer - 50 `S=1/(2^(0)+2^(50))+1/(2^(1)+2^(50))+..+1/(2^(100)+2^(50))` `S=1/(2^(100)+2^(50))+1/(2^(99)+2^(50))+…+1/(2^(0)+2^(50))` `2S=1/(2^(50)+1/(2^(50))+..` 100 times `thereforeS=50/(2^(50))`

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