(a+2b)/a=2
A | B
1 0.5
2 1
A/2=B
Is this right?
If right, why???
數 - 代數 (11) - (a+2b)/a=2
2009-09-27 12:24 am
回答 (1)
2009-09-27 3:29 am
✔ 最佳答案
(a + 2b) / a = 2[(a + 2b) / a] * a = 2 * a
a + 2b = 2a
a + 2b - a = 2a - a
2b = a
b = a/2
2009-09-30 09:18:29 補充：
This is right only when a does not equal to zero. When a is zero, there is no solution.
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090926000051KK01184