基本技能考查题
(1)
;
(2)
;
(3)若
,求
的最小值.并求
的值
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87418371097f508a1dd45a5c72511fc4.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/413294bd030eca8210588866cc9c2ad1.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d5078c1d921be3ea07c92dd277c6a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f0b84ee4ed90face0993d4f4dda379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
更新时间:2022-08-13 11:00:50
|
相似题推荐
解答题-应用题
|
适中
(0.65)
【推荐1】甲、乙两地相距
,货车从甲地匀速行驶到乙地,速度不得超过
,若货车每小时的运输成本(以元为单位)由可变成本和固定成本组成:可变成本是速度
(
)的平方的
倍,固定成本为
元.
(1)将全程运输成本
(元)表示为速度
(
)的函数,并指出这个函数的定义域;
(2)为了使全程运输成本最小,货车应以多大的速度行驶?并求出全程运输成本的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c6dbb367290726130ee6c8466b7b1da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecface2c4c9639ff16d893b91664f6b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc13a607ac0c7f76d252d7cb1bb040fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd9242efa2facde4d7c79ff0c1b00ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(1)将全程运输成本
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc13a607ac0c7f76d252d7cb1bb040fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd9242efa2facde4d7c79ff0c1b00ea.png)
(2)为了使全程运输成本最小,货车应以多大的速度行驶?并求出全程运输成本的最小值.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】设函数
,(实数
)
(1)当
,求不等式
的解集
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8fe7d3aead96c0a4121a88b9485c369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2180e18416d40abb243bd23984e7aba.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2608a57caffde627dbf140ca22a2ff8a.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】设函数
.
(1)当
时,求不等式
的解集;
(2)若
,且关于
的不等式
有解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9baf43b2e651c64863f6c5a9f427417e.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7936f84440510b7d8719949feca2b02a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d0cd47609b9d1865dfff4979161cf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】已知函数
.
(Ⅰ)若
,求不等式
的解集;
(Ⅱ)当
时
恒成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e70bbd7bca86bca02e99a5469f80396b.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173f99d0a0cf852179fe8cf28d7c5332.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1591d4244dcf5539a4ae98f554e91e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2dfb45cc752c739ec40203e5013de1c.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐3】已知函数
.
(1)若
,
,
,求不等式
的解集;
(2)当
,
,
时,若
的最小值为2,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aab687eba45f4795f21b2f99ddc2746.png)
(1)若
![](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/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e418f800b759a0dfedfe8aa5f1e940ce.png)
(2)当
![](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/8cec12441802f71e803efaf2c62ee588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c2530b9f190cc51d3430ec91bdc1052.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知函数
.
(1)解不等式
;
(2)若关于
的不等式
的解集不是空集,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715715e7bd9142cdad07e91df7c7f140.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afa9af0b431836188a83a2cdbebdf01.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a84acec78a0c322605fcf4478ad5b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知函数
.
(1)当
时,求不等式
的解集;
(2)若
恒成立,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cab87dd685cd683c425aae729bbb04b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/188281cc0c7af6e95c32b9bbb94ffc21.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5931095eb29d9d6b55ed9fa32a4ef1d.png)
您最近一年使用:0次