數學推理題----不明白

2010-07-19 7:03 pm
數學推理題:
1) 3,5,8,13,21,( )
2)4,5,8,17,44,( )
3)3,4,8,17,33,50,( )
4)11,9,7,5,3,1,( )
5)3,6,18,72,3360,( )
6)30,29,27,26,24,23,21,20,( )
7)25,24,22,19,15,( )
8)3,5,8,13,21,( )
9)4,5,8,17,44,( )
10)13,57,911,1315,1719,( )

以上的全部都是數列題...各位幫幫忙...

回答 (4)

2010-07-19 7:32 pm
✔ 最佳答案
1) 3,5,8,13,21,( 34)
2)4,5,8,17,44,(125 )
3)3,4,8,17,33,58,(94 )
4)11,9,7,5,3,1,( -1)
5)3,6,18,72,360,(2160 )
6)30,29,27,26,24,23,21,20,( 18)
7)25,24,22,19,15,( 10)
8)3,5,8,13,21,(= ?)
9)4,5,8,17,44,(=? )
10)103,507,911,1315,1719,(2123 )
2010-07-19 10:57 pm
To:fg

Give you a question......

how about 1 , 11 , 21 , 1211 , 111221 , 312211 , ....

The number after another number describes the previous number.

So the number after 312211 is 13112221.
2010-07-19 8:04 pm
1. +2,+3,+5,+8,+13.......... +n ( n= (n-1)+ (n-2) ) e.g : 5=2+3 8=5+3
2. +3^0 , +3^1 , +3^2 , ...... +n^(n-1)
3. +1^1 , +2^2 , +3^3 ,.........+n^n
4. keep on -2
5. x2 , x3 , x4 , ........
6.-1 , -2 , -1 , -2 , -1 .........
7.-1 , -2 , -3 , -4 , .........
8.same as 1
9. same as 2
10. 頭位 和 尾位 keep on (+4)
e.g. 13 頭位(1)+4=5 , 尾位(3)+4=7 so = 57
e.g. 1315 頭位(13)+4=17 , 尾位(15)+4=19 so=1719

2010-07-19 12:07:35 補充:
Give you a question......

how about 1 , 11 , 21 , 1211 , 111221 , 312211 , ....
參考: me, my teacher
2010-07-19 7:05 pm
第三題的50是不是應該為58?

2010-07-19 11:07:38 補充:
第五題的3360是不是應該為360?

2010-07-19 11:09:24 補充:
第一題與第八題相同。
第二題與第九題相同。


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