已知函数
.
(1)求过点
且与曲线
相切的直线方程;
(2)设
,其中a为非零实数,若
有两个极值点
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee1dcc2a471ac89dd3cec62e77f6ff9.png)
(1)求过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d836280b3e758c30cbd7e8a5b7fbf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f786a5701dc1a8a015e8843c3360151b.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/9387c3b3079c432e3845c60466fe0921.png)
更新时间:2017-07-26 11:25:29
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解答题-问答题
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困难
(0.15)
【推荐1】已知函数
.
(1)试讨论
的单调性;
(2)若曲线
过原点
的切线有且只有
条,求
的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b7c6e148d6a5443c72cfa90ea8650fd.png)
(1)试讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解答题-证明题
|
困难
(0.15)
名校
【推荐2】已知函数
,函数
的最大值为
.
(1)求
的值;
(2)求证:
①
与
的一条公切线过原点;
②
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3670393a3749dde0e26275ae01575e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8731c29de930d48e1a1adab031c81e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bf50615abfa8dc7dbbb173784fcc74.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求证:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05fce924911d5ed93147dfce9e41c2b0.png)
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困难
(0.15)
【推荐3】如果有且仅有两条不同的直线与函数
的图象均相切,那么称这两个函数
为“
函数组”.
(1)判断函数
与
是否为“
函数组”,其中
为自然对数的底数,并说明理由;
(2)已知函数
与
为“
函数组”,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8fd1e808e015f4cb43d2e3a0529ac6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8fd1e808e015f4cb43d2e3a0529ac6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bea75e6fa8f587c7afff0ffb563b921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5db192285632d1991b4ee7a003a52205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a3eda8f315eb3b1e949c7a0989b9bd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30612ee82e71ff4c6f831f1b43c25bf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-证明题
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困难
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解题方法
【推荐1】已知函数
.
(1)若方程
在区间
内有且仅有两个不同的实数解
.
①求实数a的取值范围;
②证明:
.
(2)设函数
的零点按从小到大的顺序依次为
,极值点按从小到大的顺序依次为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce30917f4f30c79eb1164f16feedf43c.png)
(1)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338316b0fe50fdea0f2f75aec4c990dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb106bdbfc9fe4f82ae8eaa80db66306.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
①求实数a的取值范围;
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21cf1974c4f9fd94ad52a5062a1099f8.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3f50584e5e040938569f224e1bebcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/594ece58873a4e5e170c80974a8d24eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17567492ed0e5d9c78396df3e44775c8.png)
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困难
(0.15)
名校
解题方法
【推荐2】已知函数
.
(1)若
,求
的最小值;
(2)若
有两个极值点
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72129232bc08169f91a6051c66c8d34f.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6431947d4d5927719020c327c5ad605f.png)
您最近一年使用:0次
解答题
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困难
(0.15)
【推荐1】设函数
.
(1)若
是
的极值点,求实数
的值;
(2)若函数
只有一个零点,求实数
的取值范围 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fcead2e0dd4ceffb184c2883678d507.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187c21027ff08411931d32c530b64fd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047515b5be792919a7d03cb2b5310b3e.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
|
困难
(0.15)
名校
【推荐2】已知函数
.
(1)若
是函数
的一个极值点,求实数
的值;
(2)若函数
有两个极值点
,其中
,
①求实数
的取值范围;
②若不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e8f5c8b17efe9f8cf0e8da9d0aec55b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
①求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
②若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2be62f76340252fc7ed79d98519795a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
解答题-问答题
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困难
(0.15)
【推荐3】已知函数
.
(1)讨论
的单调性;
(2)若曲线
在点
,
处的切线都平行于
轴,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8923affba77d55b330a58dd208d84b04.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad9a4881ebe1a4a566d0fab96d71baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13f2e49cf2b8b8da8fe58ca87760e78.png)
您最近一年使用:0次