[AMATHS] Vector問題

👨🏻‍🏫 學術台數學

[匿名]

2011-02-20 9:02 pm

有一條問題唔知佢問咩...請大家幫幫忙~~THX~~

http://i859.photobucket.com/albums/ab158/charlieho/vector.jpg

呢個係果條數ge link, 因為有圖, 所以唔可以直接post...

更新1:

仲有一條數... 請大家幫幫忙... http://i859.photobucket.com/albums/ab158/charlieho/vectorQ7.jpg

回答 (2)

myisland8132

2011-02-20 9:34 pm

✔ 最佳答案

2(a) m = AB + BC/2, n = AB + BC + CN = AB + BC - AB/2 = AB/2 + BC(b) m = AB + BC/2...(1), n = AB/2 + BC...(2)So, AB = m - BC/2. Sub. into (2)n = m/2 - BC/4 + BCn - m/2 = 3BC/4BC = (4n - 2m)/3AB = m - BC/2 = m - (4n - 2m)/6 = (4m - 2n)/3(c) AC = AB + BC= (4m - 2n)/3 + (4n - 2m)/3= 2(m + n)/3

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STEVIE-G™

2011-02-20 9:23 pm

As follows:

圖片參考：http://i707.photobucket.com/albums/ww74/stevieg90/ScreenHunter_02Feb201322.gif

2011-02-20 14:52:40 補充：
你發問一條新問題可唔可以再開另一個post?

參考: http://i707.photobucket.com/albums/ww74/stevieg90/ScreenHunter_02Feb201322.gif

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收錄日期: 2021-04-22 00:54:03
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