a / 1-r = 4a?
回答 (2)
2016-05-23 12:39 pm
A / (1 - r) = 4a
Provided that 1 - r ≠ 0
[A / (1 - r)] × (1 - r) = 4a × (1 - r)
A = 4a(1 - r)
Provided that 1 - r ≠ 0
[A / (1 - r)] × (1 - r) = 4a × (1 - r)
A = 4a(1 - r)
2016-05-23 1:10 pm
A /(1-r) = 4a
multiply both sides by 1-r
A = 4a(1-r)
multiply both sides by 1-r
A = 4a(1-r)
收錄日期: 2021-04-18 14:50:50
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https://hk.answers.yahoo.com/question/index?qid=20160523043349AAKb2TL