证明不等式1/(2^2)+1/(3^2)++1/(n^2)证明不等式1/(2^2)+1/(3^2)+···+1/(n^2)

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证明不等式1/(2^2)+1/(3^2)++1/(n^2)证明不等式1/(2^2)+1/(3^2)+···+1/(n^2)

证明不等式1/(2^2)+1/(3^2)++1/(n^2)证明不等式1/(2^2)+1/(3^2)+···+1/(n^2)
证明不等式1/(2^2)+1/(3^2)++1/(n^2)
证明不等式1/(2^2)+1/(3^2)+···+1/(n^2)

证明不等式1/(2^2)+1/(3^2)++1/(n^2)证明不等式1/(2^2)+1/(3^2)+···+1/(n^2)
1/(2^2)+1/(3^2)+···+1/(n^2)

1/(2^2)+1/(3^2)+···+1/(n^2)<1/(1*2)+1/(2*3)+···+1/((n-1)*n)=1/1-1/2+1/2-1/3+……+1/(n-1)-1/n=1-1/n=(n-1)/n