
[中學] 向量計算

請問第一題該如何思考及計算?
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06/26 15:37, , 1F
06/26 15:37, 1F
※ 編輯: s92004570 (101.11.15.74), 06/26/2015 15:39:19
※ 編輯: s92004570 (101.11.15.74), 06/26/2015 15:39:54
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06/26 15:51, , 2F
06/26 15:51, 2F
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06/26 16:17, , 3F
06/26 16:17, 3F
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06/26 16:21, , 4F
06/26 16:21, 4F
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06/26 17:34, , 5F
06/26 17:34, 5F
推
06/26 17:41, , 6F
06/26 17:41, 6F

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06/26 17:44, , 7F
06/26 17:44, 7F