1 . 设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c30ee388d945875e585c25daec7e2fc4.png)
.
(1)若
,求证:
是完全平方数;
(2)证明:存在无穷多个正整数对
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c30ee388d945875e585c25daec7e2fc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82b872914335d22f93f6c866d2b5c61.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b2fb1017d5dfe3a300de3e14a71b6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f41be870e84c819362787849770519.png)
(2)证明:存在无穷多个正整数对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/698c4d4e50062b4a7dd70fe1b4ab4fd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b2fb1017d5dfe3a300de3e14a71b6f.png)
您最近一年使用:0次
解题方法
2 . 已知动点P到直线l:
的距离比到定点
的距离多1.
(1)求动点P的轨迹E的方程;
(2)若A为(1)中曲线E上一点,过点A作直线l的垂线,垂足为C,过坐标原点O的直线OC交曲线E于另外一点B.证明:直线AB过定点,并求出定点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092fd1b1d33979818300cd2e3699bff7.png)
(1)求动点P的轨迹E的方程;
(2)若A为(1)中曲线E上一点,过点A作直线l的垂线,垂足为C,过坐标原点O的直线OC交曲线E于另外一点B.证明:直线AB过定点,并求出定点坐标.
您最近一年使用:0次
2011高三上·山东菏泽·专题练习
3 . 已知函数
有如下性质:如果常数
,那么该函数在区间
上是减函数,在
上是增函数.
(1)如果函数
(
)的值域为
,求b的值;
(2)研究函数
(常数
)在定义域上的单调性,并说明理由;
(3)对函数
和
(常数
)作出推广,使它们都是你所推广的函数的特例.研究推广后的函数的单调性(只须写出结论,不必证明),并求函数
(n是正整数)在区间
上的最大值和最小值(可利用你的研究结论).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae543122a9a00feb76c84fd2ee6d1369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311f24add812e85cff437a699caa202e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c049415b40b1e5d3ddbd8c6b945c987c.png)
(1)如果函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33063230cfd1e497b93e1b87bc1a154.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d875db0083b0b82f8864f1b25f7f7c7.png)
(2)研究函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c845cf8af8bfb0463e9797cc5628b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
(3)对函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae543122a9a00feb76c84fd2ee6d1369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d74fef9c96eb3f55872919e7054f087a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300f5517aa55c4c832e2008c18f436a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b448fe164c2c2931805e3b3847dcdd75.png)
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2021-09-25更新
|
1262次组卷
|
7卷引用:2021年陕西省渭南市韩城市高中数学竞赛试题
13-14高二下·甘肃兰州·期中
名校
解题方法
4 . 已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cc4ca2d12b83f2a479132620116164.png)
(1)对一切
恒成立,求实数a的取值范围;
(2)证明:对一切
,都有
成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cc4ca2d12b83f2a479132620116164.png)
(1)对一切
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e0a05c9789724344002cd6bcb99143a.png)
(2)证明:对一切
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966b60302d80d8613675bb3dd5c03164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/513ddc07d9b763ed7e1c8055154b8183.png)
您最近一年使用:0次
2021-09-14更新
|
833次组卷
|
12卷引用:2015年全国高中数学联赛陕西赛区预赛试题
2015年全国高中数学联赛陕西赛区预赛试题陕西省西安市长安区第一中学2017-2018学年高二上学期期末考试数学(文)试题(已下线)2013-2014学年甘肃省兰州一中高二下学期期中考试理科数学试卷(已下线)2013-2014学年甘肃兰州一中高二下学期期中理科数学试卷2015-2016学年河北省正定中学高二上学期期末文科数学卷2015-2016学年湖北沙市中学高二下第五次半月考文数学卷山西省怀仁县第一中学2016-2017学年高二下学期期中考试数学(理)试题【区级联考】天津市和平区2018-2019学年度第二学期高二年级期中质量调查数学学科试题2020届湖南省株洲市茶陵二中高三上学期第二次月考数学(文)试题河北省石家庄二中实验学校2020-2021学年高二下学期4月月考数学试题新疆克拉玛依市2022届高三下学期第三次模拟检测数学(理)试题(已下线)专题2-6 导数大题证明不等式归类-2
5 . 已知数列
的前n项和
,且满足
.
(1)求证:数列
是等比数列;
(2)若数列
满足
,
为数列
的前n项和,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca8ac08b1dda83e8b171d4937c40ce66.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a080c94bf1ffea8d5af10f9688978fb5.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b106d3c1113b9217724bf99d90de3b9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de2746040b593c449081174b3b5e4920.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6828a1cf75f19bb74a0e0490bd65c168.png)
您最近一年使用:0次
2020-04-13更新
|
1181次组卷
|
7卷引用:陕西省渭南市韩城市2019-2020学年高二上学期竞赛考试数学试题
6 . 已知函数
,数列
、
满足
,
,
,
,
.
(1)求
的取值范围,使得对任意的正整数
,都有
;
(2)若
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fbd56fe7b6b14439638211d79f79eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390636a89883bd64bf8da9bf8654aff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d765033fa3e470b4b4bae90a28514587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc5ac1542da56851d19240e723a1530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca42e7cd03df12843de137eb8843f37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66e713f441cb0f03cf7ca5d7f4cd157f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2798e1dcab1f7f0fe3b8a94b3cd6a88.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b72ddd7de598464a37b10f03f67b904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb774169e51010958807547268ca0430.png)
您最近一年使用:0次
2008高三·陕西·竞赛
7 . 如图,AB是半圆
的直径,C是AB的中点,M是弦AC的中点,
,垂足为H.求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df12d899e32eb0924322ad7bf333e49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f397e8001807c5b020a54b1ce51125.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df12d899e32eb0924322ad7bf333e49.png)
![](https://img.xkw.com/dksih/QBM/2018/12/19/2100065192468480/2102986546774016/STEM/4892541f-f548-4245-bcc0-ae9affed3ed5.png)
您最近一年使用:0次
2008高三·陕西·竞赛
8 . 如图,在直角坐标平面
中,
为正三角形,且满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a674bee22c96ac8462211b9282b15eac.png)
①求证:点
在同一条抛物线
上,并求出该抛物线的方程;
②过①中所求抛物线
的焦点F作两条互相垂直的弦AC、BD,求四边形ABCD面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e970cfda6ac632156c2f471e785a2376.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a674bee22c96ac8462211b9282b15eac.png)
①求证:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2315c20df27b35d89eb625bcaa86ea0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
②过①中所求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/e62d116f-3d4b-4d85-94bd-2ea718479870.png?resizew=179)
您最近一年使用:0次
2008高三·陕西·竞赛
9 . 设
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56b90cd9326ef1a970ee42ea74dd652a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee50590e93fbc438da2f187e9c2eca1.png)
您最近一年使用:0次