1 f4 math

👨🏻‍🏫 學術台數學

Anonymous

2009-10-19 12:39 am

Simplify and express the result in the form of a+bi

1.) 7-i/-i

回答 (2)

Neta

2009-10-19 12:46 am

✔ 最佳答案

7-i/-i
=(7-i)*i/(i*i)
=7i-(i*i)/(-1)
=7i+1/(-1)
=-1-7i

2009-10-18 16:59:02 補充：
7-i/-i
=(7-i)*i/(-i*i)
=7i-(i*i)/1
=7i+1
sorry!

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用戶2053

2009-10-19 12:44 am

你不是問過了嗎?

http://hk.knowledge.yahoo.com/question/question?qid=7009101400787

2009-10-18 16:53:08 補充：
捏他 :

分母是 - i 啊!

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