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 2007-06-01 04:36:17
- shocamefromebay
- Member
- Registered: 2007-05-30
- Posts: 103
weird formula???
does any one no what (n!-n) is a formuala for??
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#2 2007-06-01 05:22:20
- Ricky
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- Registered: 2005-12-04
- Posts: 3,791
Re: weird formula???
Construct an ordered list of n objects. It's the number of permutations of n objects where each map does not have the property where there is exactly one element mapped to itself and all other elements are mapped to their successor in a circular manner.
"In the real world, this would be a problem. But in mathematics, we can just define a place where this problem doesn't exist. So we'll go ahead and do that now..."
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#3 2007-06-01 06:37:22
- shocamefromebay
- Member
- Registered: 2007-05-30
- Posts: 103
Re: weird formula???
o0o. hmmm but i was also wondering is ther any like weird pattern with the formula???like number patterns??
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