1 . 对于各数互不相等的整数数组
(其中
是不小于3的正整数),若
,当
时,有
,则称
,
为该数组的一个“逆序”,一个数组中所有“逆序”的个数称为该数组的“逆序数”,如数组
的逆序数等于2.
(1)数组
的逆序数等于______ .
(2)若数组
的逆序数为
,则数组
的逆序数为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/536d5e70a2caf72151735ca04b55a3d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f67a74de6c2731a0a66887f4994db2f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4610754dff007c541aa4887d8705329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8149ae00fb94a16b872a4d1ee311fea7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f10d9894335fb59c22f8f5d6a0f67c5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faee37d6362a556db87dab0e55c6bb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe5544683f4edb34893ecf99b802ecc0.png)
(1)数组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/464b773618cb4a5c2d1d44f8c1c0031a.png)
(2)若数组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/536d5e70a2caf72151735ca04b55a3d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b541a463ca4314552efddf567ee921e0.png)
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2 . 已知函数
函数,若函数
恰有3个零点,则实数
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a98fd04f0220d9027ef13abde5dda1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a290a3e654931ddf831363c340d3299.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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3 . 定义函数
,其中
表示不小于
的最小整数,如
,
.当
时,函数
的值域为
,记集合
中元素的个数为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab342d472fe409e73bee1be8a61774d3.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90455c0d197e72cce9591f005739447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f344fd588492f8bcbb5f55b2946ea735.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cddffa0c43a184cd7a2b43a645f46ae3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de6da80ad94ab5ac73d5f69c2131a495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08dbc86aa7e43ee1d538ebd7d997fc01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab342d472fe409e73bee1be8a61774d3.png)
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2021-09-20更新
|
374次组卷
|
6卷引用:2015届湖南省株洲市第二中学高三第四次月考理科数学试卷
名校
4 . 在正方形
中,边长
,
的中点为
,现将
沿对角线
翻折(如图),则在翻折的过程中.下列说法正确的是______ .(填正确命题的序号)
![](https://img.xkw.com/dksih/QBM/2020/1/9/2373284223197184/2373910197141504/STEM/3d34b3eb289f4fad9954143a7410becf.png?resizew=302)
①直线
与直线
所成的角为
(
,
不重合时);
②三棱锥
体积的最大值为
;
③三棱锥
外接球的表面积为
;
④点
运动形成的轨迹为椭圆的一部分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c505c02c59313fe0108392a5bf5127.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2020/1/9/2373284223197184/2373910197141504/STEM/3d34b3eb289f4fad9954143a7410becf.png?resizew=302)
①直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
②三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41ffdaecfb3c73d403179e5745c71a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c9298da3cd8b9db58692e0173f3fd3.png)
③三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4986217611fc5eefe70fd217a9d5726a.png)
④点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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名校
5 . 对于函数y=f(x),若存在x0,使f(x0)+f(﹣x0)=0,则称点(x0,f(x0))是曲线f(x)的“优美点”•已知f(x)
若曲线f(x)存在“优美点”,则实数k的取值范围为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70b79893efd80c5aed962dab5d1408bf.png)
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6 . 《九章算术》中的“两鼠穿墙题”是我国数学的古典名题:“今有垣厚若干尺,两鼠对穿,大鼠日一尺,小鼠也日一尺,大鼠日自倍,小鼠日自半,问何日相逢,各穿几何?”题意是:“有两只老鼠从墙的两边打洞穿墙,大老鼠第一天进一尺,以后每天加倍;小老鼠第一天也进一尺,以后每天减半.”如果一墙厚10尺,请问两只老鼠最少在第________ 天相遇.
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2019-11-21更新
|
255次组卷
|
3卷引用:四川省成都市新都区2019-2020学年高三诊断测试文科数学试题
名校
7 . 定义![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3b76285422bfdae19f74a0cd4d556e0.png)
,若
,则使不等式
成立的
的取值范围是____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3b76285422bfdae19f74a0cd4d556e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0814e0093307933d405b6ad5346f8ddb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850947ed19c48c542c3c8d58aea41311.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea31e10b8151f880681b7540d2edbb4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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2019-10-25更新
|
194次组卷
|
2卷引用:湖北省“荆、荆、襄、宜四地七校考试联盟”2019年高三上学期10月月考数学(文)试题
名校
8 . 已知
,由
有无穷多个根:0,
,
,
,…,可得:
,把这个式子的右边展开,发现
的系数为
,即
,请由
出发,类比上述思路与方法,可写出类似的一个结论_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4febb30ed7022bb9df6ca276e0c7c6f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1289059730a4c5a1d007f104078bdf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c002e82946ffe97e765194c6748594cd.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af043dd1f1ade644f36ed01b6f7ad93.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e685003765ab771dd38d929a4492eb15.png)
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2019-12-16更新
|
197次组卷
|
2卷引用:上海市浦东新区建平中学2018-2019学年高三下学期3月月考数学试题
名校
解题方法
9 . 丹麦数学家琴生(Jensen)是19世纪对数学分析做出卓越贡献的巨人,特别是在函数的凸凹性与不等式方面留下了很多宝贵的成果,设函数
在
上的导函数为
,
在
上的导函数为
,若在
上
恒成立,则称函数
在
上为“凸函数”,已知
在
上为“凸函数”,则实数
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30277e0be448b4955903e81e8795e45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30277e0be448b4955903e81e8795e45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a9a154a651efb83f4b0cc4ae8f3cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30277e0be448b4955903e81e8795e45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c890d297ee0208f0d9e3fd31088bb0bf.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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2019-08-23更新
|
711次组卷
|
5卷引用:河北省辛集中学2020届高三9月月考数学(理)试题
河北省辛集中学2020届高三9月月考数学(理)试题【市级联考】贵州省遵义市2019届高三第一次联考理科数学试题(已下线)专题3.5 第三章 导数(单元测试) -《2020年高考一轮复习讲练测》(浙江版)(测)福建省泉州晋江市磁灶中学、内坑中学2021届高三上学期期末联考数学试题安徽省六安市第一中学2020-2021学年高二下学期第二次阶段检测文科数学试题
名校
10 . 对于在区间
上有意义的两个函数
和
,如果对任意
,均有
,那么我们称
和
在
上是接近的,若
与
在闭区间
上是接近的,则实数
的一个可能值是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4776c85b79df196f606d3ebf3697fbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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