1,4,8,13
2,5,9,14
3,6,10,15
佢地number patterns係咩 ?
number patterns
2007-03-28 4:04 am
回答 (3)
2007-03-28 4:54 am
✔ 最佳答案
1,4,8,13通項: [(n+1)(n+2)/2] - 2
2,5,9,14
通項: [(n+1)(n+2)/2] - 1
3,6,10,15
通項: [(n+1)(n+2)/2]
2007-03-27 20:56:14 補充：
上面朋友的答案似乎錯了。代n=2的時候，公式已經不對。
2007-03-28 4:47 am
專用既公式:首項+尾項×( n-1) (n=係個patterns)
1,4,8,13
1+13×(n-1)
=1+(13n-13)
=1+13n-13
=13n-12
2,5,9,14
2+14×(n-1)
=2+(14n-14)
=2+14n-14
=14n-12
3,6,10,15
3+15×(n-1)
=3+(15n-15)
=3+15n-15
=15n-12
其實至緊要唔係答案,係知道條式,你知道左,就以後咩數字都識計個pattern啦^v^
1,4,8,13
1+13×(n-1)
=1+(13n-13)
=1+13n-13
=13n-12
2,5,9,14
2+14×(n-1)
=2+(14n-14)
=2+14n-14
=14n-12
3,6,10,15
3+15×(n-1)
=3+(15n-15)
=3+15n-15
=15n-12
其實至緊要唔係答案,係知道條式,你知道左,就以後咩數字都識計個pattern啦^v^
參考: me
2007-03-28 4:10 am
1+[3]=4
4+[4]=8
8+[5]=13
2+[3]=5
5+[4]=9
9+[5]=14
3+[3]=6
6+[4]=10
10+[5]=15
+3 +4 +5
4+[4]=8
8+[5]=13
2+[3]=5
5+[4]=9
9+[5]=14
3+[3]=6
6+[4]=10
10+[5]=15
+3 +4 +5
參考: myself
收錄日期: 2021-04-12 18:49:45
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070327000051KK03665