Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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**iamaditya****Member**- From: Planet Mars
- Registered: 2016-11-15
- Posts: 798

∞

∑ x^(-n)=1/(x-1)

n=1

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There is no substitute to hard work

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It converges only if

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