发布时间:2021-02-19 21:27:15
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(1)两个长度相等的向量一定相等;
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(2)相等的向量起点必相同;
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(3)平行向量就是共线向量;
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(4)若向量a的模小于b的模,则a<b;
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(5)质量、动量、功、加速度都是向量;
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(6)与共线,则A,B,C,D四点必在一条直线上;
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(7)向量a与b平行,则a与b的方向相同或相反;
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(8)在△ABC中,;
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(9)若向量a与b有共同的起点,则以b的终点为起点,以a的终点为终点的向量等于b-a;
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(10)若且b≠0,当a=时,则一定有a,b共线;
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(11)若a·b=0,则或;
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(12)若a·b=a·c,且a≠0,则b=c;
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(13)向量a在b方向上的射影是一个模等于(是a与b的夹角),方向与b相同或相反的向量;
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(14).
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(1)F (2)F (3)T (4)F (5)F (6)F (7)T (8)T (9)F (10)T (11)F (12)F (13)F (14)T |