已知函数
.
(1)求
在点
处的切线方程
,并证明
;
(2)若方程
有两个正实数根
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ba7f6650a47610941b3ce55b896afe.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b29a7faa14a6e09d0db2d04f4ced03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c887da0c850acf41ab249cc262ae39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc6e69ad1a27916fb5c3d5901ded134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdda91b3f668548adb7ea3b66759f99.png)
(2)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca222b41bc1a04389365b9c06ef55008.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb94fb3646feaf8ef62e76184c1a2655.png)
2017·山西临汾·一模 查看更多[3]
更新时间:2017-05-04 22:45:50
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】已知函数
,
,
.
(1)证明:函数
在
处的切线恒过定点;
(2)求函数
的单调区间;
(3)证明:对任意实数b,当
时,都有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627172fc49f8dc1f77f8211590e1c249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc3d06b54f895fe703277db2b7ea99ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)证明:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9f8845aa2b51c460f2d798c9f62fa3.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)证明:对任意实数b,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b47952ada2ed5a108ae6204ad2c950e.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
解题方法
【推荐2】已知直线
与椭圆
过直线
上一点
作椭圆
的两条切线,切点分别为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f0e22b063f716a60e5ad55b761556b6.png)
(1)求证:直线
恒过定点;
(2)设
为坐标原点,当点
不在坐标轴上且
时,求此时点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58fe7e1d2034b3d3cd99a6d0733283b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5821a009e87695ce15ba95b0e34142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4ec88a9b350e5b57055c70d55f633ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f0e22b063f716a60e5ad55b761556b6.png)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1695034a4c212e5568fe41625fd2a417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
解答题-问答题
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较难
(0.4)
名校
【推荐3】已知函数
.
(1)求函数
在
处的切线方程;
(2)若
对
恒成立,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28741a8673e888e253ed4d89745e641.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87d291738bed3d4c7bb87f2aca02ddc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66692ec49a458f9e48c7315d03dfc37b.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】函数
,其中
.
(1)试讨论函数
的单调性;
(2)已知当
(其中
是自然对数的底数)时,在
上至少存在一点
,使
成立,求
的取值范围;
(3)求证:当
时,对任意
,有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983d8295d9cded16f5cd9a2fea80209d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4c78214e43a8b93f2a57072033cbcf.png)
(1)试讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)已知当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/925a60a48264e7b5137c4e9ed1cbabb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11204e2fb6e560bf7a4ca26eaebfc526.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d74c779eb0944c04a64674430d913e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65b32eb5d19110016d6cb313ff0ad89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed39f5aca78934fb383402433fe549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54c8f568caa5a8f0d227bba9b63b89e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b9b5dd6d8ad3c27fedb152c78960178.png)
您最近一年使用:0次
解答题-问答题
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较难
(0.4)
【推荐2】已知函数
.
(1)讨论
的单调性;
(2)若
存在两个极值点
,证明:
.
![](https://img.xkw.com/dksih/QBM/2018/12/13/2095907847159808/2100913126154240/STEM/388dc545aff54b5a994560c9e381ff9b.png?resizew=92)
(1)讨论
![](https://img.xkw.com/dksih/QBM/2018/12/13/2095907847159808/2100913126154240/STEM/cb943aedb15d4a168e2e3bac16c6ac1d.png?resizew=20)
(2)若
![](https://img.xkw.com/dksih/QBM/2018/12/13/2095907847159808/2100913126154240/STEM/cb943aedb15d4a168e2e3bac16c6ac1d.png?resizew=20)
![](https://img.xkw.com/dksih/QBM/2018/12/13/2095907847159808/2100913126154240/STEM/849286e4629740d59d6d66853f9a21ef.png?resizew=26)
![](https://img.xkw.com/dksih/QBM/2018/12/13/2095907847159808/2100913126154240/STEM/2dc7cfad70314754ba00b26424d983cf.png?resizew=92)
您最近一年使用:0次
解答题-证明题
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较难
(0.4)
【推荐1】已知函数
.
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恒成立,求证:
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/490686e021e18760e8c297cd912f4eb9.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3967d620e2fef3ecc724c66e29f68a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5371016d99684eb1dbac0a25d8800085.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966b60302d80d8613675bb3dd5c03164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561800aa679a45da4dbe0e323de1fd59.png)
您最近一年使用:0次
解答题-问答题
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较难
(0.4)
名校
解题方法
【推荐2】已知函数
(
).
(1)求
在
上的单调性及极值;
(2)若
,对任意的
,不等式
都在
上有解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c538571b6fb5af548632568d7fb9ce2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96977a5415357a1b31b00b91b511f884.png)
(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b99cd08c67dfa2306a67ce0f1c5e71.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次