代數難題(要小數)
回答 (2)
2007-04-27 3:44 am
✔ 最佳答案
...‧.........‧........‧.................‧.........‧.........‧...........‧0. 9y + 0. 8y + 0. 7y + .......+ 0. 1y = 0.09 + 0.009 +0.0009
FIND THE VALUE OF y
參考: Keith ^^
2007-04-26 1:26 am
0.15x+0.25x+0.5x=9
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https://hk.answers.yahoo.com/question/index?qid=20070425000051KK01976