Sorry, my English isn't quite well.
Here is the problem.
When $n$ moves toward infinity $$ 1/(1^2)+1/(2^2)+1/(3^2)+\dots +1/(n^2)=? $$
Any ideas?
Sorry, my English isn't quite well.
Here is the problem.
When $n$ moves toward infinity $$ 1/(1^2)+1/(2^2)+1/(3^2)+\dots +1/(n^2)=? $$
Any ideas?