1 . 判断下列命题是否正确(正确的在括号内打“√”,错误的打“×”).
(1)
.( )
(2)
.( )
(3)
.( )
(4)
.( )
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1822ed1d5dc8dbc7eb3df3a2ebf383.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041b78c6299d5543a50671e4cdccd71c.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04a50e1688a4992c77b7071a37911d2a.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c45c13ae9649f0377df9b64d15f1897.png)
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2 . 已知
、
是两个非零向量,判断下列说法是否正确,并说明理由.
(1)
与
是共线向量,且
的模是
的模的2倍;
(2)
与
的方向相同,且
的模是
的模的
;
(3)
与
是一对相反向量;
(4)
与
是一对相反向量.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c0dc6d6d80c0ac3b7f8293308dde5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c0dc6d6d80c0ac3b7f8293308dde5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019a02040f516e4a11d9d2450867d1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3daa31067c1cfc51ab8e5f8f7010951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019a02040f516e4a11d9d2450867d1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3daa31067c1cfc51ab8e5f8f7010951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c0dc6d6d80c0ac3b7f8293308dde5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae5629794de85103eaa127c44144a29b.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4ff655de43e2bfea4ed9ae34e36de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69c9314d93ae08d4e6dfd1f575f076c9.png)
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