Math Is Fun Forum
Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °
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#1 2007-12-30 17:11:36
- JohnnyReinB
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- Registered: 2007-10-08
- Posts: 453
What's this for?
Does anyone know what this is for?
Last edited by JohnnyReinB (2007-12-30 17:12:57)
"There is not a difference between an in-law and an outlaw, except maybe that an outlaw is wanted" 
Nisi Quam Primum, Nequequam
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#2 2007-12-30 17:33:15
- pi man
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- Registered: 2006-07-06
- Posts: 251
Re: What's this for?
n(n+1)/2 is the summation of 1 through n. That's the closest thing I can think of.
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