已知
是曲线
的两条互相平行的切线,则
与
的距离的最大值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f5c00a4cb3fc3783b4abeb06fb4d58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
更新时间:2016-12-03 00:34:16
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名校
【推荐1】已知函数
,
,曲线
上总存在两点
,
,使曲线
在
、
两点处的切线互相平行
,则
的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5426a7cf1d7a83ab823b6965f0eb4a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf92129d28c79c6776d32af81a79689b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8198c3b302b3820e86763428eb1e91cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3463ced6030af957f13f9ba05b977c1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e1b2fc3d27f0953c953a4cbad2c199.png)
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【推荐2】经研究发现,三次函数
都有对称中心,设其为
,则
,反之也成立,其中
是函数
的导函数
的导数.已知
,若对任意的实数
,函数
在
和
处的切线互相平行,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/012429b7101ba0f84e7b45598ed12db9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43db00e106c7d08a76a7ba71ca5e63d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/965b37ac03c097e77a1a5ec7fc9af3b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5a7472816f7828f0ef6fad75b136a40.png)
![](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/63a3435071e9c50774149b2cd1817478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad4dd3be7b5428975bc9100f2d33732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e7e52478a86eff946369f37831c25a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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【推荐1】如果直线
和直线
都平行于直线
,则
之间的距离为_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e394aea4b0c8e8f5c2972fb5d61ea753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5834b4b532b908350b851649849f3cf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de5717a3d99b01450c7f43f7c795941a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
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解题方法
【推荐2】已知两条平行直线
:
,
:
,则
与
间的距离为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebfbc2f02627ba9e405ec478cdbb0ea6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
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