已知函数
和
有相同的最大值.
(1)求
;
(2)证明:存在直线
,其与两条曲线
和
有三个不同的交点,并且从左到右的三个交点的横坐标
满足
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5795f9263f70d1f7d2f89165e366d34f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d89dfdd2adf17982c868565991131daa.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)证明:存在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af79f45b5880c72a349500da9d8e118d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ad01314d1a1474f5319abbbf57cab3.png)
更新时间:2024-01-06 15:03:19
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相似题推荐
解答题-证明题
|
较难
(0.4)
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【推荐1】已经函数
的定义域为
,设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fecfcf79236b2ae4f41a1a3467f3709c.png)
(1)试确定
的取值范围,使得函数
在
上为单调函数
(2)求证![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb7961cbe98aac6a5fdee94582c341b4.png)
(3)若不等式
(为
正整数)对任意正实数
恒成立,求
的最大值.(解答过程可参考使用以下数据
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb8e97d564dcfb1eac6a74a22cbe15a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae3777d65a4e4a642c6772a1870c8b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fecfcf79236b2ae4f41a1a3467f3709c.png)
(1)试确定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae3777d65a4e4a642c6772a1870c8b9.png)
(2)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb7961cbe98aac6a5fdee94582c341b4.png)
(3)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fcdb4ce16754c0ad2a1bfcc4d4a8ab5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4e5144b51594e872e645b2034426eb3.png)
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【推荐2】若对实数
,函数
、
满足
,且
,则称
为“平滑函数”,
为该函数的“平滑点”已知
,
.
(1)若1是平滑函数
的“平滑点”,
(ⅰ)求实数a,b的值;
(ⅱ)若过点
可作三条不同的直线与函数
的图象相切,求实数t的取值范围;
(2)判断是否存在
,使得对任意
,函数
存在正的“平滑点”,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099adf32792e7334032a80084e0cb584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f0635e4216fd981fe2fafe03f423e4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29f8fdcbd3641e0670cad6350ece1eda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9406c4a389b6f38cd5edc96b2360a7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721759a4a441e59ea5e09970a05c63df.png)
(1)若1是平滑函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
(ⅰ)求实数a,b的值;
(ⅱ)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c8db81f577fc60b130924c3f5e3c27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f5a90aeba435af22d6bcdb7b91650b8.png)
(2)判断是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
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【推荐3】已知直线
与曲线
在点
处相切,且
与
轴交点的横坐标为
.
(1)求函数
的单调减区间;
(2)在
前提下,试确定曲线
与直线
交点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eacca9bfffb7abd9dac3b78483fa2c15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa482d7bcaa385bfc3548b42a4bfb60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df2817c52144d06555e98131b5e657c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d8041c797b98b834c70dbf7d1d4346.png)
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【推荐1】已知函数
,其中
,
为自然对数的底数.
(1)试讨论
的单调性;
(2)是否存在正整数
,使得
对一切
恒成立?若存在,求出
的最大值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eac443727f974606305e50a73f663f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
(1)试讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)是否存在正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c07f7aa36fd6334578ff6c0f7f86b24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐2】已知函数
,
,其中
.
(1)讨论函数
的单调区间;
(2)若
,任意
,不等式
恒成立时最大的
记为
,当
时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be28c77f3fc54adc396be35554c49d3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0313e11b81abf9a1effe701d18ab3bda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82163ff34dbab061502e0e550244fc4a.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a99f1bc6895934a9e2a6d659383ded9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43920f5171ed31db2520ef00e4c5fc24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b97e1cf5da9abae155e4a6a14901208.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980ab4deb9e7f2bc9288787f5243a4d2.png)
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