名校
解题方法
1 . 设函数
与
是定义在同一区间
上的两个函数,若对任意的
,都有
,则称
与
在
上是“
度和谐函数”,
称为“
度密切区间”.设函数
与
在
上是“
度和谐函数”,则
的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4776c85b79df196f606d3ebf3697fbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70128385b9ab66ac44614af35a0dcdce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d8bd6df00df678b97b402819992a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4776c85b79df196f606d3ebf3697fbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4776c85b79df196f606d3ebf3697fbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64263fe2ca48e694c87496d61e63fb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/245cf005ea128004f66642a7413711d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86f8b396f2ae63e79ffd8886ae4d3849.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2020-04-20更新
|
345次组卷
|
5卷引用:安徽省六安中学2020-2021学年高三上学期第三次月考数学(理)试题
名校
解题方法
2 . 已知函数
的导函数为
,当
时,
成立,则下列不等式一定成立的是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d49ec515fb1fdc93ca4dda443326ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca089b83b22eaf5db3851bc88a3ad314.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
名校
3 . 规定
为不超过x的最大整数,对任意实数x,令
,
,
.若
,
,则x的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ab85825d4a002600ca41bd3cd2ee7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb7455952a45e44857b44de4da4c2748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515f0a4933d1c875f896847dc285ce46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbbb829347f9a8019d358b98dc0262b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c106871978af1860fa3c1185d4adeb29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209636e6f2a0b394115eb01b48eb0520.png)
您最近一年使用:0次
2020-03-09更新
|
407次组卷
|
2卷引用:安徽省池州市贵池区2019-2020学年高一上学期期中数学试题
名校
解题方法
4 .
中,内角A,B,C所对的边分别为
.①若
,则
;②若
,则
一定为等腰三角形;③若
,则
一定为直角三角形;④若
,
,且该三角形有两解,则
的范围是
.以上结论中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2914b3a076102aa20c37b8f271e3491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b883d9703a1deaf8dbc18097c6b8bb2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f60e5761cc8e165eb470a8894b5d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b1dd07c0571772e96d318f974724810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772c0affad8d0c8f3dba25c1eee7834b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea0c6abd1f8cb11a9af35a1c872bc7dc.png)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
2020-03-05更新
|
945次组卷
|
6卷引用:【全国百强校】安徽省蚌埠市第二中学2018-2019学年高一下学期期中考试数学试题
名校
解题方法
5 . 等差数列
的前
项和为
,若
,则满足
的正整数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51785fc99f097e27659f720bec95d122.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8e1bb201b13f61d9f8916f20925439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
您最近一年使用:0次
名校
解题方法
6 . 已知函数
,对任意实数
都有
成立,当
时,
恒成立,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a01160a0a3c9cb144ba35c7f8acd10e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b3b657ebd1733b4f19dcbec44919924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1591d4244dcf5539a4ae98f554e91e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2020-03-04更新
|
461次组卷
|
5卷引用:安徽省池州市第一中学2020-2021学年高一上学期12月月考数学试题
安徽省池州市第一中学2020-2021学年高一上学期12月月考数学试题江西省新余市第一中学2019-2020学年高一上学期第一次段考数学试题江西省南昌市第三中学2020-2021学年度高一10月份月考数学试题(已下线)【南昌新东方】 江西省南昌三中2020-2021学年高一上学期10月第一次月考数学试题四川省攀枝花市第七高级中学校2021-2022学年高一上学期第一次月考数学试题
名校
7 . 在平面直角坐标系
中,已知直线
(
为参数),以坐标原点为极点,
轴的非负半轴为极轴建立极坐标系.点
在曲线
上运动,点
为线段
的中点.
(1)求动点
的运动轨迹
的参数方程;
(2)若直线
与
的公共点分别为
,当
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d430b5c4c3a4d1c8e55550ae2efe5237.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb32336a07bdea17b0c634a56337fc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c7d3d89b684b78bd1c216ddd2e070b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2020-03-04更新
|
842次组卷
|
6卷引用:安徽师范大学附属中学2021-2022学年高三上学期入学考试理科数学试题
解题方法
8 . 2021年广东新高考将实行“
”模式,即语文、数学、英语必选,物理、历史二选一,政治、地理、化学、生物四选二,共选六科参加高考.其中偏理方向是二选一时选物理,偏文方向是二选一时选历史,对后四科选择没有限定.
(1)小明随机选课,求他选择偏理方向及生物学科的概率;
(2)小明、小吴同时随机选课,约定选择偏理方向及生物学科,求他们选课相同的概率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8e63a3de229aa35d7e95b166802303.png)
(1)小明随机选课,求他选择偏理方向及生物学科的概率;
(2)小明、小吴同时随机选课,约定选择偏理方向及生物学科,求他们选课相同的概率.
您最近一年使用:0次
2020-03-03更新
|
245次组卷
|
4卷引用:安徽省六安中学2021-2022学年高二上学期期中理科数学试题
解题方法
9 . 在
中,角A,B,C的对边分别为a,b,c.若
,
,则
的形状为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a64b4d679a2a1364ef822f2f0d04960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ca890db371750d26ec7f049cfe4f714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
A.直角三角形 | B.等边三角形 | C.等腰直角三角形 | D.等腰或直角三角形 |
您最近一年使用:0次
2020-03-03更新
|
239次组卷
|
3卷引用:安徽省安庆市2023-2024学年高二上学期期末考试数学试题
名校
10 . 如图,在平面四边形ABCD中,若
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/3/1/2410280873664512/2411761409302528/STEM/38792083145341c2bf03af3ced79132d.png?resizew=124)
(1)求
;
(2)若
,求BC.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb48a51345750060a62c1d1be14001f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454328a8e75953fdb0835ce80d9566e3.png)
![](https://img.xkw.com/dksih/QBM/2020/3/1/2410280873664512/2411761409302528/STEM/38792083145341c2bf03af3ced79132d.png?resizew=124)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868ff1350bd72625328c85c3097cd85e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c73a630682dadedc68a22be17530a83b.png)
您最近一年使用:0次
2020-03-03更新
|
645次组卷
|
8卷引用:安徽省蚌埠市2019-2020学年高一下学期期末数学试题