解题方法
1 . 已知集合
,
,其中
,且
.若
,且对集合A中的任意两个元素
,都有
,则称集合A具有性质P.
(1)判断集合
是否具有性质P;并另外写出一个具有性质P且含5个元素的集合A;
(2)若集合
具有性质P.
①求证:
的最大值不小于
;
②求n的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e9a3f4c7334a730ea37d803402891d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8b572950af972d5e265f689e35314c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1368a045ba80f97383f3d9d7fcdc8f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a0838190df3e2d7328dae29243d10a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85463b225751e4fb81ae802db61176bb.png)
(1)判断集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6632f39a4c514336a74d274bb3d6a77d.png)
(2)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8b572950af972d5e265f689e35314c.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2b789cb4ce6b7919d64d88dbdc1c89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7426bc7343f7c515f079530f93e0c3a.png)
②求n的最大值.
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解题方法
2 . 在西方,人们把宽与长之比为
的矩形称为黄金矩形,这个比例
被称为黄金分割比例.如图,名画《蒙娜丽莎的微笑》的整个画面的主体部分便很好地体现了黄金分割比例,其中矩形
,矩形
,矩形
,矩形
,矩形
为黄金矩形.若画中点G与点K间的距离超过
,点C与点F间的距离不超过
,则该名画中,A与B间的距离可能为( )(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/465cbd8405a0ac6b7104b6c5019ef203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/465cbd8405a0ac6b7104b6c5019ef203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28d6477c85c5a4ac410a884e92fbe53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b29f99026a0ea8890fcd5ad58aebfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3465752a6da0917f568f97d7c730ef3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58f061a3d81d89f31187c476b63fc7a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b07fa2c0f0935a012685586b3b59abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9822e15763be5cb6c49936df274a6748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424f5882a4180ffa3a1312f88e8a3023.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
3 . 已知函数
.
(1)求不等式
的解集;
(2)若关于
的不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe84cebf3fd30d5300bd730d896afc11.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57082c0a22d9d368a3f44de5af74ce9e.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c3aca930926ab36ea3cfca8532ccdc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2020-06-03更新
|
269次组卷
|
4卷引用:2020届河南省商丘周口市部分学校联考高三5月质量检测数学(文科)试题
名校
4 . 已知实数
,且
,则当
取得最大值时,
这100个数中,值为1的个数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e21d3761c4473f723d87f15d7586b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7122481ca1c2ee6ccd3e102176575d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c623a3d87d084f484930258eae196cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df86196c04cec356979da912259a38d3.png)
A.50个 | B.51个 | C.52个 | D.53个 |
您最近一年使用:0次
2020-05-21更新
|
210次组卷
|
2卷引用:2020届上海市松江区高三下学期模拟考质量监控数学试题
5 . 在平面直角坐标系中,定义
为两点
,
之间的“折线距离”.则下列命题中:
①若
点在线段
上,则有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c88bc23a08b4df25ae5f9d20dd00c2bc.png)
②若点
,
,
是三角形的三个顶点,则有
.
③到
两点的“折线距离”相等的点的轨迹是直线
.
④若
为坐标原点,
在直线
上,则
的最小值为
.
真命题的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09bfe93acc89b09a1e4603d35e1f41a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6f5adf13b4214666292dd64b947741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af405a054bfe7fb7ce40e48d816467e1.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c88bc23a08b4df25ae5f9d20dd00c2bc.png)
②若点
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c88bc23a08b4df25ae5f9d20dd00c2bc.png)
③到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af2742c3570c1dcbcf1e2a140c877ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
④若
![](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/e2c10877f24b1b2c7b2265a301f2202f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3bcb4828b16c8e845492f1a53ddd9a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b91d650c2fc1a741fabdb333b09aeb6.png)
真命题的个数为( )
A.1 | B.2 | C.3 | D.4 |
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名校
解题方法
6 . 已知关于x的不等式
的解集为A.
(1)若
,求A;
(2)若
,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac0cdf35fd256033009811b269682893.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/843c3f388a75bf981c11ca947a86e5fa.png)
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2013·陕西·模拟预测
名校
7 . 设f(x)=2|x|-|x+3|,若关于x的不等式f(x)+|2t-3|≤0有解,则参数t的取值范围为________ .
您最近一年使用:0次
名校
8 . 若函数
满足:对任意一个三角形,只要它的三边长
都在函数
的定义域内,就有函数值
也是某个三角形的三边长.则称函数
为保三角形函数,下面四个函数:①
;②
;③
;④
为保三角形函数的序号为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699d32dbd2b31b313ae7154c9a072775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa624b10e67b044103128eeec67213ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641a8d86db7a96bd6ff25345ceb4cc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a5d54d880c1903ee94379be6010e5ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b8e109a8fda1474ddae02822c01c1e.png)
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2018-08-30更新
|
570次组卷
|
2卷引用:【全国百强校】四川省成都石室中学2017-2018学年高一下学期期末考试数学试题
9 . 在直角坐标系中,定义
之间的“直角距离”:
.若点
,
为直线
上的动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afcf3f2dd70267daf292fd7affbe3cf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b175cbe0bf64d7852e3270158d29bad4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a85dd382fa447b567a9de87cac1990d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ff7e0ef1f622120cc1b18e9d3e80ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abd1ceef6e219ee7dfa3f72f3014e92.png)
(Ⅰ)解关于的不等式
;
(Ⅱ)求的最小值.
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10 . 据统计某超市两种蔬菜
连续
天价格分别为
和
,令
,若
中元素个数大于
,则称蔬菜A在这
天的价格低于蔬菜
的价格,记作:
,现有三种蔬菜
,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d02a8555da4dbbc7820a50a95b071ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f178daf0f98f101bb2c8d459ecd342e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4fe4fb43137ebe3ece24328362ab414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08daf8d942be695bc53e5e22d24d3722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98d0b9c0c01b49be6e08a111568f77f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次
2017-05-04更新
|
846次组卷
|
5卷引用:北京市东城区2017届高三二模理科数学试题