名校
1 . “
三个内角的度数构成等差数列”是“
中有一个内角为
”的________ 条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
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2 . 如果
,
,则
是
的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5615dd2fa05634dfefb04907774c424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73df6c9da21eee7f1e745108b2e1f14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c2506d20a126f83563fb48009d87c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3854a1870df3dfab871bb1b15d41cb07.png)
A.充分条件 | B.充要条件 | C.必要条件 | D.非充分非必要条件 |
您最近一年使用:0次
2019-11-21更新
|
191次组卷
|
2卷引用:上海市嘉定区封浜高级中学2019-2020学年高二上学期期中数学试题
解题方法
3 . 平面直角坐标系
中,设
是圆
上的点,且
构成了一个公差
不为零的等差数列
记![](https://staticzujuan.xkw.com/quesimg/Upload/formula/874d98618db374206cb58d7ed1426e86.png)
(1)若
及
求点
的坐标;
(2)若
对于给定的自然数
写出符合条件的点
存在的充要条件,并说明理由;
(3)若
点
对于给定的自然数
当公差
变化时,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f29e3942d97d0e50b003c96ca2211bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96a4968fbf245002ca71b6232b6dd83e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56944f8cc267bca55f8c1981e5d2891b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354164cdc3ef0112394da22ca0037308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/874d98618db374206cb58d7ed1426e86.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5bc93b76fb5379c3d4792c1ff5fc5d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90e1f6d1fabe7e615e48dd3badf54721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d8992d6c1d16f40f5844228b7d00129.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a728893f304329135fbc25e1735921.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8436c5f99606845e527ba1d8c9b949d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eb4c1799be06c9b0208be30aa9faaf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa38dba3681c7b18114885e82463880a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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