名校
1 . 已知
,
,且
,函数
在
上的最小值为
.
(1)求
的值;
(2)若
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a09184b24c7c594555d0377cdee65a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b069a087f414d27fc11cc303875fd88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5bda102350f5b35801fe3b6c505bb37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
2023-12-20更新
|
76次组卷
|
2卷引用:陕西省西安市长安区第一中学2024届高三上学期期中数学(文)试题
名校
解题方法
2 . 已知
、
均为正数,设
;
(1)当
,
时,求不等式
的解集;
(2)若
的最大值为
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b57b60530e00c661c4ad46ec7804d0.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7266b2ef457b8ddeee3fa2cc24022e.png)
您最近一年使用:0次
2023-12-20更新
|
74次组卷
|
2卷引用:陕西省汉中市普通高中联盟学校2023-2024学年高三上学期期中联考数学(理)试题
名校
解题方法
3 . (1)解不等式
;
(2)用作差法比较大小
与
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef79213e3f1afd42daf467a78474c7dc.png)
(2)用作差法比较大小
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1567f3ba3dd484d885a134239b6a7496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f41d3f5345d3af16392fc6da4e669459.png)
您最近一年使用:0次
2023-12-20更新
|
647次组卷
|
2卷引用:新疆维吾尔自治区喀什市第十中学2023-2024学年高一上学期期中考试数学试题
解题方法
4 . 某学校准备购买手套和帽子用于奖励在秋季运动会中获奖的运动员,其中手套的单价为
元,帽子的单价为
元,且
.现有两种购买方案
.
方案一:手套的购买数量为
件,帽子的购买数量为
个;
方案二:手套的购买数量为
件,帽子的购买数量为
个;
(1)采用方案一需花费
,采用方案二需花费
,试问采用哪种购买方案花费更少?请说明理由;
(2)若
,
,
,
满足
,
,求这两种方案花费的差值
的最小值.(注:差值
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c54de564e53ed78b21512cc722cf0218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650b262681fdf608130ab36553b24009.png)
方案一:手套的购买数量为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
方案二:手套的购买数量为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(1)采用方案一需花费
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3f53300c959a34a5f46bb01d14f82f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6615a400b8698dbec1b763e391251f7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8efa8d99157a149e49eb50f4d7274ee9.png)
您最近一年使用:0次
5 . 设
,
,则有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772448addb5306354fd0356d78f9dce2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f23f477518a4d601c98aecd8472fe1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-12-19更新
|
346次组卷
|
2卷引用:浙江省S9联盟2023-2024学年高一上学期期中联考数学试题
名校
6 . 已知
,
,则下列不等式中错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0e271b6e63206285461a7552d11efd7.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-12-16更新
|
119次组卷
|
2卷引用:河北省保定市六校联盟2023-2024学年高一上学期11月期中考试数学试题
名校
解题方法
7 . (1)已知
,
,
都是正实数,求证:
;
(2)解不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef3052cd1be7641eb559c5d7ed142cb.png)
(2)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03de29aa0824cf2d903e07e9b8e1b09a.png)
您最近一年使用:0次
解题方法
8 . 已知代数式
和
.
(1)若
,求不等式
的解集;
(2)若
,证明
中至少有一个数不小于
;
(3)若
,不等式
对任意实数
恒成立,试确定实数
满足的条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fe56a82278b144101fda1fa2cf59703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c0a82f3b0b621e05cf6e77cddb0628e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3278317e48e20b5aae4912d0cfdce545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ae0a7e5eeda987af2130d0ba69bf1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da67075d5f20954afe0232112e159ac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33f8ea9598f0d9134721b35565d28e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d5b84e3d3af2112a4f066c2a9f1387.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
您最近一年使用:0次
名校
解题方法
9 . 已知a,
,试比较
与
的大小,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19339e3904e9541ff26b30ae5f1242b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b088a739322bb548eaab80a1356b51cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d89b07015d69f835f80567f23a0ad4c.png)
您最近一年使用:0次
10 . (1)已知
克糖水中含有
克糖(
),再添加
克糖(
)(假设全部溶解),糖水变甜了.请将这一事实表示为一个不等式,不必证明.利用此结论证明:若
为三角形的三边长,则
.
(2)超市里面提供两种糖:白糖每千克
元,红糖每千克
元
.小东买了相同质量的两种糖,小华买了相同价钱的两种糖.请问谁买的糖的平均价格比较高?请证明你的结论.(物品的平均价格
物品的总价钱
物品的总质量)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d100c22435a23e017cfe6f535379d3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01721633154e61aa2650bf0b8b10e666.png)
(2)超市里面提供两种糖:白糖每千克
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be646cd52d7f2f1714e7542e75810f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adad9633b73dfbbb3d84b4f15979e99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f3fa74d328be03b864d77912107cd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09052719a6d55df23d74d8e3956257ea.png)
您最近一年使用:0次