關於數列 - 推理遊戲
By Noah
at 2009-03-26T22:41
at 2009-03-26T22:41
Table of Contents
※ 引述《sword188 (琮)》之銘言：
: 今天看到國二的一題數列
: 想不出是啥關係
: 21,22,24,28,30,36,?
奇數項:
3 X 7 = 21
3 X 8 = 3 X ( 7+2^0) = 24
3 X 10 = 3 X ( 8+2^1) = 30
3 X 14 = 3 X (10+2^2) = 42
3 X 22 = 3 X (14+2^3) = 66
偶數項:
2 X 11 = 22
2 X 14 = 2 X (11+3) = 28
2 X 18 = 2 X (14+4) = 36
2 X 23 = 2 X (18+5) = 46
2 X 29 = 2 X (23+6) = 58
所以 21 22 24 28 30 36 42 46 66 58
亂猜的XD"
: ?應為何~~~~
: 聽說答案是42
: 但總想不出關連~~!
: 請教各位了~~!
--
: 今天看到國二的一題數列
: 想不出是啥關係
: 21,22,24,28,30,36,?
奇數項:
3 X 7 = 21
3 X 8 = 3 X ( 7+2^0) = 24
3 X 10 = 3 X ( 8+2^1) = 30
3 X 14 = 3 X (10+2^2) = 42
3 X 22 = 3 X (14+2^3) = 66
偶數項:
2 X 11 = 22
2 X 14 = 2 X (11+3) = 28
2 X 18 = 2 X (14+4) = 36
2 X 23 = 2 X (18+5) = 46
2 X 29 = 2 X (23+6) = 58
所以 21 22 24 28 30 36 42 46 66 58
亂猜的XD"
: ?應為何~~~~
: 聽說答案是42
: 但總想不出關連~~!
: 請教各位了~~!
--
Tags:
推理遊戲
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at 2009-03-30T12:37
at 2009-03-30T12:37
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