已知函数
在
处的切线为
.
(1)求实数a的值及函数
的极值;
(2)用
表示不超过实数t的最大整数,如:
,若
时,
恒成立,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d003582cccf8169fb0555ee1271e1f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d0aa9412dd7caf42cc71520e282328.png)
(1)求实数a的值及函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/400803f620f09b09f75f75c53c1b0c79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c0a19c9b3031fdc7b55f684e39dd60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dbea82fac26610043522cff4232393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/400803f620f09b09f75f75c53c1b0c79.png)
更新时间:2022-12-19 12:07:54
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【推荐1】已知函数
的图象过点
,且在点
处的切线与直线
垂直.
(1)求实数
的值;
(2)求
在
(
为自然对数的底数)上的最大值;
(3)对任意给定的正实数
,曲线
上是否存在两点
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(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a475fec8ded321e10a6697319fb975.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe26865b48931717483c8b8f16b1d37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(3)对任意给定的正实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fdc02f00cf00a6dfd88b53a90f1f7a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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【推荐2】已知函数
,其中
.
(Ⅰ)若曲线
在点
处的切线方程为
,其中
是自然对数的底数,求
的值:
(Ⅱ)若函数
是
内的减函数,求正数
的取值范围;
(Ⅲ)若方程
无实数根,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e495165a77634ccb58af50f37cba3a38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(Ⅰ)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ffeb2e82278491407c85dc15eb7df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66aeff59d357e109422434b58f3e4895.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d218992d1942266d7208e476d0c4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅱ)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a7a4a037a4dfe973f1eb683d93d799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅲ)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b92b70365c63607daecdc8deb73ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-证明题
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【推荐2】已知函数
,
是
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f384533e554c0c61125931a2d855ebe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e808873b814cf720131eeed83e88bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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(2)若关于
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【推荐3】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
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名校
解题方法
【推荐1】已知
,函数
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fba2cbc0ed924655dada9b3d76e08c8e.png)
(1)求
在
的切线方程;
(2)若
在
恒成立,求
的取值范围;
(3)若
与
有公共点,
(ⅰ)当
时,求
的取值范围;
(ⅱ)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73254f32b6da29ecc32df2e9f87a4c97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d6159bc4e4da151a749ca8b7179344b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fba2cbc0ed924655dada9b3d76e08c8e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9f8845aa2b51c460f2d798c9f62fa3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31384d225a3ab67e71e520f76e8ec311.png)
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解答题-问答题
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困难
(0.15)
解题方法
【推荐2】已知函数
.
(1)当
时,求曲线
在点
处的切线与两坐标轴围成的三角形的面积;
(2)若对任意的
,不等式
恒成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7a012101143b7c656a0e0e1cca7a936.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66692ec49a458f9e48c7315d03dfc37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bce033f58f20322c57bb505653574d1.png)
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解答题-问答题
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困难
(0.15)
解题方法
【推荐3】已知函数
.
(1)讨论
在
极值点个数;
(2)证明:不等式
在
恒成立.
附:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18679c9696d863829e3d2814b4b6752f.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbfe8e7fb253685e0e50bae0c5482314.png)
(2)证明:不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc299018cae8bc47faa38c156b355ec6.png)
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94badf6f3203e03a978ac4deededb764.png)
您最近一年使用:0次