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I have to calculate:

[tex]\sum 1/(2n + 1)^2 [/tex]

n from 0 to infinite

Knowing that 1/n² = (pi)²/6

The answer is (pi)²/8

I don't know why I'm stuck here but I just don't get it...

Greetings

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# Series, it's a riddle to me !

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