已知函数
.
(1)当
时,求证:
;
(2)若不等式
在
上恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef32db498bfdebab5420487aaf901b2e.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dafc8477bcb0b26f92ec1f2686c965a.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4cb72814fc154c01ff58d865e8a9b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c0b6ca237b90b49a91d9d74d007efdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2020-05-28 06:43:45
|
相似题推荐
解答题-问答题
|
较难
(0.4)
名校
【推荐1】已知函数
,
,
为
的导数,且
.证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
在
内有唯一零点;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
.
(参考数据:
,
,
,
,
.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78cfb9361b23e62c80cc5ce46519b42f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e01b6fb6a1c7a895df528382a5583444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585de67a3fc494297d375d339af6d153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eac3b16d86d875dcfc2ff9f11baeec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d0cd47609b9d1865dfff4979161cf5.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c517bf0d1bd67fadcd69f1375b0243bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/157cff1b36a0f7aca3dd312330df74d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25170a7659aa7cb1ebdf013ed1299b80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6eb6826dcc8bf38391aa3670447e02d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a061dce0c7716ceab53159cd4ce7904.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
解题方法
【推荐2】已知
.
(1)求
的单调区间和最值;
(2)定理:若函数
在
上可导,在
上连续,则存在
,使得
.该定理称为“拉格朗日中值定理”,请利用该定理解决下面问题:
若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9050ed7a94f79ad5a969b77a80baf52f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)定理:若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30277e0be448b4955903e81e8795e45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f0cfa5839f97f252dc0126fa27bfc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8166cc061d434d02bccbcf153cc6b48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ba089868d2ce3254b25bf625a90689c.png)
若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a0a547c81fe36ab8c3ea79622ce7ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c502afc24d9ff9b0f07682a1d0bfa2e.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐1】已知函数
(
),
.若
恒成立,求k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df06b5f177b4ddf6eb83ed499333689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c36b234ba460321e811de1729eadd4b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c06c70674b0770dc7f6ca77bb6bb6992.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecb9a0af43fef8df0f6b72b75216d8d0.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐2】已知函数
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab9cd3690e7aa3debb1ed054a9f622da.png)
(1)讨论
的单调性;
(2)若
有两个极值点
,且
,当
恒成立时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f98134f5f42ee55b3dca41566fecde34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab9cd3690e7aa3debb1ed054a9f622da.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1025e6a74f1344bbc09b87a79778a7d4.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
|
较难
(0.4)
名校
【推荐3】已知函数
.
(1)当
时,讨论
在区间
上的单调性;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14580811977177c15bc3e7faa8e5a16a.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ed2f490aac02631c2ed9e6b76354a49.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b20d4d292ec3d0327b86dc10d0120596.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次