题目内容

如图所示,向量在一条直线上,且,则__________________(用表示)

试题分析:∵,∴,∴,∴
点评:熟练掌握向量的加减运算是解决此类问题的关键,属基础题
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已知,点C在内, ,若=2m+m),则=(    )                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
A.1B.2C.D.4

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