空间中有不共面的
个点
.求证:存在无穷个平面,恰好通过其中的两个点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629017d4178d2b98bbc882901bef023e.png)
2018高三·全国·竞赛 查看更多[1]
更新时间:2018-12-20 22:47:49
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【知识点】 反证法
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】对任意
,定义![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec17fe6767b6cf11551b82f7e47bdc0.png)
证明:不存在正整数k、m,使得
,其中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d5ec9ad92f37e64eccce922ab1b14e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec17fe6767b6cf11551b82f7e47bdc0.png)
证明:不存在正整数k、m,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea9bc16c41ae40f605dc4985915ff9c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a47b552affe415c489300d4faf5115a1.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】(1)设
、
为常数,如果对于任意
,都有
,求证:
.
(2)设
是定义在区间
,都有
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac69e6db1df13ed64756b4f391ae9fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/558a2679edd9bb8a8687ba5ba449a118.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a70d32c64918aa4d1d9d3ce0bdbf7b.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25bea6d14c16f7c06e4e028f36131360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b806fa4ecd03887d98c64a48c512d7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74088e31acd9bc94dc8bc34e616bef64.png)
您最近一年使用:0次