Notable Question - Badge - Mathematics Stack Exchange

Notable Question

Question with 2,500 views. This badge can be awarded multiple times.

Soham Chowdhury

1,78714 silver badges24 bronze badges

earned this badge 3 times.

What do I need to know to prove this? $ \frac{2\sqrt{2}}{9801} \sum_{k=0}^\infty \frac{ (4k)! (1103+26390k) }{ (k!)^4 396^{4k} } = \frac1{\pi} $ [duplicate]

Awarded Jul 31 at 16:31

Why is $\sqrt{2\sqrt{2\sqrt{2\cdots}}} = 2$? [duplicate]

Awarded Mar 2 at 1:05

Guides/tutorials to learn abstract algebra?

Awarded Jan 29, 2016 at 1:46

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