bca*4/3=cab
(abc不是a*b*c)
求abc~
更新1:
更正 abc*4/3=cab cab*4/3=bca (abc不是a*b*c) 求abc~(要number)
easy數學題~
回答 (2)
2007-01-15 7:40 am
✔ 最佳答案
好在你快速更正!符合第1題, abc 有8個數,
162
243
324
405
486
567
648
729
再要符合第2題, abc 則祇有 243 和 486
即答案是有兩個
參考: 自己試
2007-01-15 7:04 am
assume
abc is not equal to a*b*c
abc = x
bca = y
cab = z
4x/3 = y
4y/3 = z
y = z *3 / 4
4x /3 = 3 z /4
x = 3z/4 *3 /4
x = 9z/16
hence abc = 9cab/16
abc is not equal to a*b*c
abc = x
bca = y
cab = z
4x/3 = y
4y/3 = z
y = z *3 / 4
4x /3 = 3 z /4
x = 3z/4 *3 /4
x = 9z/16
hence abc = 9cab/16
收錄日期: 2021-04-28 13:29:47
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070114000051KK05749