设S1=1+1/(1^2)+1/(2^2),S2=1+1/(2^2)+1/(3^2),S3=1+1
设S1=1+1/(1^2)+1/(2^2),S2=1+1/(2^2)+1/(3^2),S3=1+1/(3^2)+1/(4^2)......Sn=1+1/[n^2+1/(n...
设S1=1+1/(1^2)+1/(2^2),S2=1+1/(2^2)+1/(3^2),S3=1+1/(3^2)+1/(4^2)......Sn=1+1/[n^2+1/(n+1)^2].设S=√S1+√S2+√S3+......+√Sn,则S=? (用含n的代数式表示,其中n为正整数)
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