1 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ed6410e3f084c35bd90d1a8df80d31.png)
(1)设
时,判断函数
在
上的零点的个数;
(2)当
,是否存在实数
,对
且
,有
恒成立,若存在,求出
的范围:若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ed6410e3f084c35bd90d1a8df80d31.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6455e38ff53ede2508e4d9cb23f0b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89102a8b0053065798286027708b40f9.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db4b1d257be599761ccab5dfc0032eaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f28983295b313f61aa5525a7939ebc69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99662adc4d0bccf42668295710bad56d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
2 . 已知函数
.
(1)若函数
的极小值为1,求实数m的值;
(2)若函数
在
时,其图象全部都在第一象限,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934ac64c3bb03b5b53e5998d5075d6ca.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b250e0575659daf43d8d4beb90d1b066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc4136bd17997e11a7f8abcb19f9018.png)
您最近一年使用:0次
解题方法
3 . 已知函数
.
(1)当
时,求
的极值;
(2)当
时,求函数
在区间
上的最大值为0,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f142de874d0327135e9bf49e469223f.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/579e2c39e6c0a640357e3b0ccd6f954a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
4 . 已知
,
两个输油站之间是120公里的沙漠地带.现需要在
,
两输油站间修建一条大型输油管道通过该沙漠地带,某工程队承接此项工程,需要铺设输油管道且在
,
之间等距离修建增压站(又称泵站).经预算,修建一个增压站的工程费用为400万元,铺设距离为
公里的相邻两增压站之间的输油管道费用为
万元.设此项工程的总费用为
万元.
(1)试将
表示成关于
的函数;
(2)当
时,讨论该函数的单调性;
(3)求出需要修建多少个增压站才能使总费用
最小,并求出最小值.
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/749d0e03dc286f2a835768d4ac5f07a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d0d46da745fa5e71ea97e7b30beb6fb.png)
(1)试将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d0d46da745fa5e71ea97e7b30beb6fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998a9c302af143f34abaa2cd0273fc00.png)
(3)求出需要修建多少个增压站才能使总费用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d0d46da745fa5e71ea97e7b30beb6fb.png)
您最近一年使用:0次
5 . 已知函数
,
.
(1)当
时,求函数
在
处的切线方程;
(2)令
,讨论函数
的零点的个数;
(3)若
,正实数
满足
,证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91da1db379dafbd535abce16fff2446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d217c7b12e12e5fb67472452518859ec.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06ddae50735a358964e2aff58cf28867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22a4a0dd7307a1323d25331e60782d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8edc9a8dca8cf050887b4915bfc962f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6330de640d51bb3970813289a4de3a5d.png)
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6 . 已知函数
.
(1)求函数
在
处的切线方程;
(2)判断函数
的导函数
在
上的单调性;并求出函数
在
上的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c46834523029dece02a18b42e4b3006c.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9f8845aa2b51c460f2d798c9f62fa3.png)
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33770cd4511e0f50f2d959ffd913e97f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/266fb77ff0e656c432a02241705ce092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3afbf92f2e07c36a1970007dadf88aa.png)
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解题方法
7 . 用总长
的钢条制成一个长方体容器的框架,如果要求所制做容器的高要比底面的长少
,那么底面积为多少时容器的容积最大?并求出它的最大容积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d703679c01d39e9227fd9f33a638434e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a73babc7157e66044b22633f1a3609.png)
您最近一年使用:0次
8 . 已知函数
.
(1)讨论函数
在
上的单调性;
(2)若曲线
仅在两个不同的点
、
处的切线都经过点
,其中
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e34906398872e76c53e69785eccc786.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
(2)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45dddee525114c09ee0d1205aed6e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b3b54e0dcdc081d45fb3df933cddc29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa70fa7eb86c3733e2c1f1c7d07dd802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c81b29ac8a01886b25dcef55c5f6877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
名校
9 . 已知函数
,
.
(1)讨论函数
的单调性;
(2)证明:当
时,方程
有且仅有一个解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ecd764374d622455deb3bdd686f3dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/259225e8576ea20bd3ca315e2a5411fe.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790eacf3ea708dc5cfbb85164e57fb27.png)
您最近一年使用:0次
10 . 已知函数
.
(1)求证:当
时,函数
在
上,存在唯一的零点;
(2)当
时,若存在
,使得
成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6ed07e16ca42ba46090143bb3b4244e.png)
(1)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5f421939ee855f25927e7570d82c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b672f564d03ed46d092bb130f229ad8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338b327f75294ec9050ff298d2b91151.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390d0dc5e5b9375690efe0a36fb84962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dae017022028ca677ba8e6ddc9df1ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次