1 . 若
,则
与
为共线向量. ( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f9f8764c76c9b62a0a60af753a1e82c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
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2 .
是
的必要条件. ( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84213e10e1cc4fe3ad3ec4a39beee165.png)
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3 . 直线
的倾斜角是
.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a1d69d7976b9ee5c6c1ebe7756e5a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
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4 . 任何一条直线都有斜率. ( )
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5 .
的单调递减区间是
.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c57e815c01a412466a6aa12d3e883a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d6bcecc26cfc18be2b04e7950e39f56.png)
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6 . 经过原点和点
的直线的倾斜角是
.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79fa058dd4ebb2d3947b293c9d9d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa2d319e976feec1b291a9c5ebcb5097.png)
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7 . 直线的倾斜角越大,其斜率就越大.( )
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8 . 直线
的斜率是
.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/962b58f6e56b0bdd3d356b016a16760b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
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9 . 直线的倾斜角的范围是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c195698ac387fe53b3b1e0248a1fcc92.png)
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c195698ac387fe53b3b1e0248a1fcc92.png)
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10 . 对于两直线
,
,有
.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b640040108d5b76cb876a66a751dd094.png)
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