[中學] 年代久遠的向量…
ptt首po+手機排版
傷眼抱歉
昨天學妹賴我問了一些數學題
一開始很順利的解決了
直到我遇到他…
http://i.imgur.com/ylruFkO.jpg
雖然年代久遠了
但是算法應該是
|a|×|b|×Cos西打
這樣沒錯吧
可是１×2×(2/1)或是-(2/1)
答案不是1或是-1嘛…
求各位大大 是我算錯還是答案抄錯
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推
09/10 17:48, , 1F
09/10 17:48, 1F
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09/10 18:03, , 2F
09/10 18:03, 2F
推
09/10 18:13, , 3F
09/10 18:13, 3F
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09/10 18:16, , 4F
09/10 18:16, 4F
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09/10 18:16, , 5F
09/10 18:16, 5F
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09/10 18:16, , 6F
09/10 18:16, 6F
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09/10 18:16, , 7F
09/10 18:16, 7F
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09/10 18:16, , 8F
09/10 18:16, 8F
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09/10 18:20, , 9F
09/10 18:20, 9F
推
09/10 18:21, , 10F
09/10 18:21, 10F
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09/10 18:22, , 11F
09/10 18:22, 11F
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09/10 18:26, , 12F
09/10 18:26, 12F
推
09/10 22:23, , 13F
09/10 22:23, 13F
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09/10 22:27, , 14F
09/10 22:27, 14F
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09/10 22:27, , 15F
09/10 22:27, 15F
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09/10 22:27, , 16F
09/10 22:27, 16F
推
09/11 09:22, , 17F
09/11 09:22, 17F