解题方法
1 . 已知函数
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/3d1bd810-67ab-46d9-93e0-a0afa9a3e87b.png?resizew=210)
(1)判断函数
的奇偶性并用定义证明;
(2)用分段函数的形式表示函数
的解析式,并直接在本题给出的坐标系中画出函数
的图像;
(3)用
表示
,
中的较大者,即
,若
,则求
的值 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/578b5d562457a6ba731ee5a2dd3b1fc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a63716f1f42c412f23bfb2f3651638c4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/3d1bd810-67ab-46d9-93e0-a0afa9a3e87b.png?resizew=210)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(2)用分段函数的形式表示函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(3)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c694cf892ee07daa54bdd9f2fb421e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b345ba4baeae1041f7d69ad09dc326c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe57503d720d07a26770942b067d2cf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
2 . 已知
是
上的奇函数,且当
时,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/52d38c14-7d26-48c7-9e2d-4ff5e11c23b6.png?resizew=189)
(1)求
;
(2)求
的解析式;
(3)画出
的图象,并指出
的单调区间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac87434324956e4145e38ad92a1aa95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f26ccb55fcd29bbbacb32598b852910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/52d38c14-7d26-48c7-9e2d-4ff5e11c23b6.png?resizew=189)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a57e7e65245a4d173c5d0bc3c34e45.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(3)画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
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3 . 已知幂函数
的图象过点
,设函数
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/24/cd4263a7-d085-4bf6-94e2-f246dc892b0d.png?resizew=183)
(1)求函数
的解析式、定义域,判断此函数的奇偶性;
(2)根据“定义”研究函数
的单调性,画出
的大致图象(简图),并求其值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05e5abce9e520b37572b68141940bbf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/687c95902f2c7a5cb9808ace73b7bbad.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/24/cd4263a7-d085-4bf6-94e2-f246dc892b0d.png?resizew=183)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)根据“定义”研究函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
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解题方法
4 . 已知函数
是定义在R上的偶函数,且当
时,
.
(1)求出函数
的解析式,画出函数的图象;
(2)函数
,
,
的最小值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db2b74d89854116e411c089d053df053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/becd598a11b876d858728161a7a09705.png)
(1)求出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f58fd27b41ba049b2b8a4aab45db075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0eac2b31a19918895e5af2d316490e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e22e1223baf7cb3d53e668c2449609.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
5 . 已知函数
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/20/fa258bee-7ce0-4613-8f74-fde8a408fb58.png?resizew=216)
(1)画出
的图象;
(2)根据图象写出函数的单调区间;
(3)求
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07a560d0c6969b117a5a8f88f87a8380.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/20/fa258bee-7ce0-4613-8f74-fde8a408fb58.png?resizew=216)
(1)画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)根据图象写出函数的单调区间;
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1bf0995f32a13d0a9e423f3e88ab271.png)
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解题方法
6 . 已知函数
的定义域为R,且图象关于原点对称,当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173700525b57dde47ed7313f65ee2aa2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/fa023e53-08d1-4967-beaa-7aeea0c44292.png?resizew=186)
(1)试求
在R上的解析式;
(2)画出函数的图象,根据图象写出它的单调区间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173700525b57dde47ed7313f65ee2aa2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/fa023e53-08d1-4967-beaa-7aeea0c44292.png?resizew=186)
(1)试求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)画出函数的图象,根据图象写出它的单调区间.
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名校
7 . 已知函数
是定义在
上的偶函数,且当
时,
,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/ee33c9d3-1695-4a33-9f76-2f8194e46a8e.png?resizew=212)
(1)现已画出函数
在
轴左侧的图象,请将函数
的图象补充完整,并写出函数
的解析式和单调减区间;
(2)若函数
,求函数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db2b74d89854116e411c089d053df053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/becd598a11b876d858728161a7a09705.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/ee33c9d3-1695-4a33-9f76-2f8194e46a8e.png?resizew=212)
(1)现已画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee97d8c31054a7150199058bc7b45cb3.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0459f7696ea12a2d22f83b5fe7f6c39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
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名校
解题方法
8 . 设函数
.
(1)画出函数
的图象;
(2)写出函数
的单调递增区间;
(3)求
在区间
上的最小值
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3c2837ca79dac067e0872eded379e91.png)
(1)画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)写出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc43583c88eb3f33bfa0518bb9b206a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b3ae7e5228fd1acb0d46f6941143a7.png)
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解题方法
9 . 已知函数
是定义在R上的奇函数,且
时,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/66e91351-5634-4733-84c4-8339b42ff671.png?resizew=167)
(1)求函数
的解析式;
(2)画出函数
的图像;
(3)若关于x的不等式
在
上有解,求实数t的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e82c4003d20b36777f7aea584e3dd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5846bdb241c53df66ec027d1c576d25.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/66e91351-5634-4733-84c4-8339b42ff671.png?resizew=167)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)若关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f815aca92df3cceb0756cdb2c29d5aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23c33b69adc112831fa115b5dffdb616.png)
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解题方法
10 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a7f673cf793364aad2543ee8ae06228.png)
(1)请在网格纸中画出
的简图,并写出函数的单调区间(无需证明);
(2)定义函数
在定义域内的
,若满足
,则称
为函数
的一阶不动点,简称不动点;若满足
,则称
为函数
的二阶不动点,简称稳定点.
①求函数
的不动点;
②求函数
的稳定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a7f673cf793364aad2543ee8ae06228.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/3dd251f6-1acf-44cf-b925-66705e04e25c.png?resizew=210)
(1)请在网格纸中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(2)定义函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1de4841073ba41dc0e7b976759c3cd4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a52dc0a7f95a39091a2f11d80cc8579f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a576aa37d6f504669b40b7b38cb92694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
①求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
②求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
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