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#1 Re: Help Me ! » A simple question » 2025-07-25 21:32:17

hypsin_0 wrote:

I know that 1/1^4+1/2^4+1/3^4+......is equal to π^4/90,but how to prove it?
I tried to solve it in my final exam in grade seven,but I failed——I got a wrong answer

That's a fascinating question to tackle, especially at that level!

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