超過12...... - 疊杯
By Gilbert
at 2010-11-27T17:11
at 2010-11-27T17:11
Table of Contents
一組杯子
就可以疊出1-10-1
那.....好幾組呢?
簡單的算出一個公式
2
24x=y +y
求出整數解
得到
0,0 不用疊拉(/‵Д′)/~ ╧╧
3,8 可以=..=b
10,15 好多杯子= =a
23,23
這種要到協會借杯子吧 囧
25,24
剛剛疊了3組
發現一件事......很容易倒
如果疊成三角錐
3 2
公式: 72x=y +3y +2y
0,0 .............
7,7 還是好多杯子 = =
以下略......
有沒有其他人玩過類似的XDDDDDD?
補 公式由來
三角
n n(n+1)
Σ k = ------
k=1 2
使Σ=12x
2
=> 24x=y +y
三角錐 = Σ(三角)
n n(n+1) 1 n(n+1)(2n+1) n(n+1)
Σ ------ = - [------------ + ------]
k=1 2 2 6 2
1 n(n+1)*(2n+1)+n(n+1)*3
= - * ---------------------
2 6
1 n(n+1)(2n+4)
= - * ------------
2 6
n(n+1)(n+2)
= -----------
6
令Σ=12x
3 2
=> 72x=y +3y +2y
--
--
就可以疊出1-10-1
那.....好幾組呢?
簡單的算出一個公式
2
24x=y +y
求出整數解
得到
0,0 不用疊拉(/‵Д′)/~ ╧╧
3,8 可以=..=b
10,15 好多杯子= =a
23,23
這種要到協會借杯子吧 囧
25,24
剛剛疊了3組
發現一件事......很容易倒
如果疊成三角錐
3 2
公式: 72x=y +3y +2y
0,0 .............
7,7 還是好多杯子 = =
以下略......
有沒有其他人玩過類似的XDDDDDD?
補 公式由來
三角
n n(n+1)
Σ k = ------
k=1 2
使Σ=12x
2
=> 24x=y +y
三角錐 = Σ(三角)
n n(n+1) 1 n(n+1)(2n+1) n(n+1)
Σ ------ = - [------------ + ------]
k=1 2 2 6 2
1 n(n+1)*(2n+1)+n(n+1)*3
= - * ---------------------
2 6
1 n(n+1)(2n+4)
= - * ------------
2 6
n(n+1)(n+2)
= -----------
6
令Σ=12x
3 2
=> 72x=y +3y +2y
--
推 TyrYawiaj:沒人嗎?那我就要不客氣的首推了XD01/10 19:08
→ TyrYawiaj:靠...01/10 19:08
--
Tags:
疊杯
All Comments
By Daph Bay
at 2010-12-01T06:47
at 2010-12-01T06:47
By Robert
at 2010-12-03T18:12
at 2010-12-03T18:12
By Rae
at 2010-12-05T11:35
at 2010-12-05T11:35
By Suhail Hany
at 2010-12-10T00:20
at 2010-12-10T00:20
By Oliver
at 2010-12-13T00:31
at 2010-12-13T00:31
By Harry
at 2010-12-13T22:55
at 2010-12-13T22:55
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at 2010-12-14T05:54
at 2010-12-14T05:54
By Enid
at 2010-12-18T16:25
at 2010-12-18T16:25
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