观察下列等式:
,以此类推,
,其中
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf5c1d124e8e023fe8e8c5ef3412813.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cc8ea158ddd44ff1c2c4b242e73cb76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d266737b4de67aca1f96592267a0492a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce395520f77714d17e5680c7937d869d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf5c1d124e8e023fe8e8c5ef3412813.png)
更新时间:2017-05-26 17:01:26
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相似题推荐
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适中
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【推荐1】在平面直角坐标系中,如果点
坐标为
,向量
可以用点
的坐标表示为
.
已知:
,
,如果
,那么
与
互相垂直.
下列四组向量:
①
,
;
②
,
;
③
,
;
④
,
.
其中互相垂直的是__________ (填上所有正确答案的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c19eb7abf64b665c0908ad18c95cab78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ad7d44b7bf40643d6709dd419dff15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29de85f9e631a4a677ab2b7b6de36d7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8bb96162edd9d3a917648a16ee11d7e.png)
已知:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/623f227e7a815da06e0d650b4e151ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/136b89a06e84d7e54833b3d9264b9efa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc6436c9e2bffba384e84e5a7e831354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/911c0a2ab5e2e85f1ad267f41cb96b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/794efd8cf0cc386faa170d01f357b1c5.png)
下列四组向量:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/565128e79583adbf446a176fb7d2c9f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1738cbdc738ce1a0d43b39b634e8e273.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc82ba2b4601a30dabb0533f9815787c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86c7fafe034a5c23423216ca6ae506c.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5bed6878d6ad0003cda5a827df3c4ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e779f5effe27246b0e34527c57aae71f.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd965ef0e7cbf73e02a9d0896f00753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b22be95f0cd613c32803ddfba8db38f8.png)
其中互相垂直的是
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【推荐2】在平面直角坐标系中,若点P(x,y)的坐标x,y均为整数,则称点P为格点.若一个多边形的顶点全是格点,则称该多边形为格点多边形.格点多边形的面积记为S,其内部的格点数记为N,边界上的格点数记为L.例如图中△ABC是格点三角形,对应的S=1,N=0,L=4.
(1)图中格点四边形DEFG对应的S,N,L分别是___________ ;
(2)已知格点多边形的面积可表示为S=aN+bL+c其中a,b,c为常数.若某格点多边形对应的N=71,L=18,则S=___________ (用数值作答).
(1)图中格点四边形DEFG对应的S,N,L分别是
(2)已知格点多边形的面积可表示为S=aN+bL+c其中a,b,c为常数.若某格点多边形对应的N=71,L=18,则S=
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/c939652c-4db9-4c8f-a115-914e99f50647.png?resizew=217)
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