名校
解题方法
1 . 已知函数
,如果存在常数
,对任意满足
的实数
,其中
,都有不等式
恒成立,则称函数
是“绝对差有界函数”
(1)函数
是“绝对差有界函数”,求常数
的取值范围;
(2)对于函数
,存在常数
,对任意的
,有
恒成立,求证:函数
为“绝对差有界函数”
(3)判断函数
是不是“绝对差有界函数”?说明理由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c413f613d1bb2dfbfc9969f82416196a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876a24bd55b56b1b1222895018eeb33c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dec717182be7265a9a11f65068da359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90a1e7412ce026da3be8b80117426f58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee3021f33d4044c903de28d926911a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c413f613d1bb2dfbfc9969f82416196a.png)
(1)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/329731df2bbd762126f4e7df01cb188c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)对于函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/062f2074ff3e5e5e72e20f4d066f0e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f20b947d584a1dc48676c2ae6e2af52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ecdccf4a334ea959a456533c40d53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/062f2074ff3e5e5e72e20f4d066f0e9d.png)
(3)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c266b102e4db9bcbb5a1e4ca16c9253a.png)
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解题方法
2 . 已知函数
.
(1)求函数
的极值;
(2)设函数
的导函数为
,若
(
),证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a54ae06f45443a86a386b8d10e1d2b3.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ad1f38ab4116e36ab4441b28b55fbe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f057bf79e066c9e6421f4efb06566a5.png)
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解题方法
3 . 已知函数
.
(1)若曲线
在
处的切线的方程为
,求实数
的值;
(2)若函数
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987ac6a091c08c22d0c1988afb516ff4.png)
(1)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec25d99e167935341292c69465a4cc5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3229b5416d45ec449f2bd1983d29d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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4 . 定义:若变量
,且满足:
,其中
,称
是关于的“
型函数”.
(1)当
时,求
关于
的“2型函数”在点
处的切线方程;
(2)若
是关于
的“
型函数”,
(i)求
的最小值:
(ii)求证:
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69ee6696dee035519e1ba7fb78269830.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86cd5635eebf0bdafa6988c5e19f9741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d141dc84dc0fefeae957dd44c67af9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd456469aaa6dafb1e275183d217435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef233ad3db01fa3ce9ee94eaad8e64e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
(i)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
(ii)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1379ccd8a64b186a1c9940a3dfdde4a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2889dd3096379db5dfdd51305bdbb743.png)
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5 . 已知函数
.
(1)讨论函数的单调性;
(2)若对任意的
,使
恒成立,则实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a6db35fdf2545b8cf8c0e259f2d419f.png)
(1)讨论函数的单调性;
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa0252d0e1f600ad566a19f22f47c114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a7c2c68ff0f4fc26f278b6a739b0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
解题方法
6 . 已知函数
.
(1)若函数
在
处切线的斜率为
,求实数
的值;
(2)当
时,
恒成立,求实数
的最大值;
(3)当
时,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c184406ae1fa0da48c6082b92d2219.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cdba5d5d80a36fc99da8c10b7518b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57168c18d660dc5ec57a5395d4337eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4479d8b0d4ee7850f1f71785553be042.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500faa44dfb3b1ccae2fec327bb0c82d.png)
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名校
7 . 对于函数
的导函数
,若在其定义域内存在实数
和t,使得
成立,则称
是“卓然”函数,并称t是
的“卓然值”.
(1)试分别判断函数
,
和
,
是不是“卓然”函数?并说明理由;
(2)若
是“卓然”函数,且“卓然值”为2,求实数m的取值范围;
(3)证明:
是“卓然”函数,并求出该函数“卓然值”的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afb80007983e5b99dcdeebf87d18ff4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851c68ef2e0703706f3b528daa902eb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79faaa73be5986e48442dcd5e80bc0a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afb80007983e5b99dcdeebf87d18ff4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afb80007983e5b99dcdeebf87d18ff4.png)
(1)试分别判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b629bea8e22de9bfc49158e2289871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9322dd8f56b5f8d2c667fdf0d4a9f9aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f42b2a9736c8943106472a7398d2892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/264e54b81230f39733dcc4f39cf31c13.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3fdcbe2501044dbf77ba6d6e786a34.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b1a851f8e1dcaa446c0afa18656dfa8.png)
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名校
解题方法
8 . 已知函数
,
.(注:
是自然对数的底数)
(1)若
无极值点,求实数
的取值范围;
(2)当
时,
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c33ef652f63f1b43282aedbf71311e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f7f23e7f20dd8bc65a4967cd306782.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797bbd18359c9a29842b39109b3a0aac.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a01be1031ca8543348a8dddc833db2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
9 . 已知函数
.
(1)若
,求
在点
处的切线方程,并求函数的单调区间:
(2)若
在定义域
上的值域是
的子集,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ef13030c733ca84463af61776fd01e5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f909328384f9c52134243753d9c954ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f909328384f9c52134243753d9c954ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
名校
解题方法
10 . 已知函数
.
(1)当
时,曲线
与曲线
恰有一条公切线,
,求实数
与
的值;
(2)若函数
有两个极值点
且
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394196c7ba56a513b45b045e2d7cb6af.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3333a1bf3a961a3b1a50d042f6860bcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682dcc172381f8d3f36e5c0c24e140be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6132cbd09b7af0c27fcf09bdc7e900f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca579894dad67bc82cb715fd48e0d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19168a4eb13db773d09609a06b2cf08d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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