在直角坐标平面内,已知点列
如果
为正偶数,则向量
的坐标(用
表示)为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a209e9b698eca3d5d5eb4991c7ecee11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc97a1639a4b885bf2df111a845aefa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
10-11高三·天津·阶段练习 查看更多[1]
(已下线)2011届天津市高三十校联考理科数学
更新时间:2016-11-30 23:52:34
|
相似题推荐
填空题-单空题
|
适中
(0.65)
名校
解题方法
【推荐1】直线
与抛物线C:
交于M,N两点,点P是抛物线C准线上的一点,记![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eb84dbda95f9b186f02602c6c85df15.png)
,其中O为抛物线C的顶点,给出下列命题:
①
,使得
与
平行;
②
且
,使得
与
垂直;
③
不可能是等边三角形;
④无论点P在准线上如何运动,
总成立.
其中,所有正确命题的序号是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eb84dbda95f9b186f02602c6c85df15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a69af0799ec8b715676ebb5bb47abce.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18e229673d9d2e6f61cb5c69f3eb9be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec64476aaca08de0808afda3618109c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c968347eabbb636d20b607a3bcfe0ac3.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18e229673d9d2e6f61cb5c69f3eb9be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3a915c1a8a9304aeb307d130faaeb15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec64476aaca08de0808afda3618109c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c968347eabbb636d20b607a3bcfe0ac3.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
④无论点P在准线上如何运动,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c69a18ac82d772e7c7707efe8f44eb6.png)
其中,所有正确命题的序号是
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
解题方法
【推荐2】如图,半径为1的扇形AOB的圆心角为
,点C在AB上,且
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89acc82cb747ff57569b0bcaf68f877d.png)
________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/744f6cde9d70c3e27c36e4ffec81b9c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8d53f6d504fbd7e84bd250d9cc819b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89acc82cb747ff57569b0bcaf68f877d.png)
![](https://img.xkw.com/dksih/QBM/2021/4/5/2693470254137344/2808188140371968/STEM/3e06ae05-5640-42c2-8b6e-db1ed0b9675d.png?resizew=218)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
【推荐2】造纸术是我国古代四大发明之一.纸张的规格是指纸张制成后,经过修整切边,裁成一定的尺寸.现在我国采用国际标准,规定以
、
、…、
;
、
、…、
等标记来表示纸张的幅面规格.复印纸幅面规格只采用
系列和
系列,其中
系列的幅面规格为:①
规格的纸张的幅宽(以
表示)和长度(以
表示)的比例关系为
;②将
纸张沿长度方向对开成两等分,便成为
规格.
纸张沿长度方向对开成两等分,便成为
规格,…,如此对开至
规格.现有
、
、
、…、
纸各一张.若
纸的面积为
,则这9张纸的面积之和等于______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75ac52148d09a7b76f4594a0676df064.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da19aacc5ac0163ad248c21b659c3673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d51ef44a1e99a24f59321edd2c863861.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8815f37ec57b86a5147b3a4744d90c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090b10a0ff232aa808059397144bb23b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36943c41002690b2dbd3f3b1dc39d7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4489d9b83072184c0e1d6b09be50ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1e8babee63bfc889ae5a34632284bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4489d9b83072184c0e1d6b09be50ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75ac52148d09a7b76f4594a0676df064.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a2f35137e52ec64072635be05605325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75ac52148d09a7b76f4594a0676df064.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da19aacc5ac0163ad248c21b659c3673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da19aacc5ac0163ad248c21b659c3673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6618d43112aee46258b07eaa6ec51703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fe540ce5d0e7b83e6b3eb1f837e24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75ac52148d09a7b76f4594a0676df064.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da19aacc5ac0163ad248c21b659c3673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6618d43112aee46258b07eaa6ec51703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fe540ce5d0e7b83e6b3eb1f837e24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59974423718d2ab74c5c351653d48ed1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f27c86a61c3949c5af0d5d2d24aa814.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85ccdc7aaa645c8bcc8978cda5479821.png)
您最近一年使用:0次