解题方法
1 . 已知不等式
的解集为
,函数
的定义域为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e0e9b13c5137b228b9c58e6e9bd7eb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e17e0bd1077f6db2e82f07d77c036129.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d259db9bb0e132881e875a77d324057.png)
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解题方法
2 . 已知函数f(x)=lg(x2﹣5x+6)和
的定义域分别是集合A、B,
(1)求集合A,B;
(2)求集合A∪B,A∩B.
![](https://img.xkw.com/dksih/QBM/2016/2/25/1572499519602688/1572499525214208/STEM/5c23d206dfe54e39b2353436835607d1.png)
(1)求集合A,B;
(2)求集合A∪B,A∩B.
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解题方法
3 . 已知
,分别求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a8d6b2302dfba93aba6c07dd014be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da13e3932cf2dbf1c8e7622d95ca9b79.png)
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4 . 求下列函数的定义域和值域
(1)![](https://img.xkw.com/dksih/QBM/2015/12/1/1572327829463040/1572327835230208/STEM/ab9a73edae884c4fa5682243f4bdf366.png)
(2)
(1)
![](https://img.xkw.com/dksih/QBM/2015/12/1/1572327829463040/1572327835230208/STEM/ab9a73edae884c4fa5682243f4bdf366.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7615174c1f705ff69244afc16fd625c.png)
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5 . 已知函数
的定义域为
,
(Ⅰ)求
;
(Ⅱ)当
时,求函数
的最大值.
![](https://img.xkw.com/dksih/QBM/2015/6/26/1572148544200704/1572148549951488/STEM/d5caba4002c943b388f1402515fa2a46.png)
![](https://img.xkw.com/dksih/QBM/2015/6/26/1572148544200704/1572148549951488/STEM/b46212510e274773b4d211b3552383a0.png)
(Ⅰ)求
![](https://img.xkw.com/dksih/QBM/2015/6/26/1572148544200704/1572148549951488/STEM/b46212510e274773b4d211b3552383a0.png)
(Ⅱ)当
![](https://img.xkw.com/dksih/QBM/2015/6/26/1572148544200704/1572148549951488/STEM/7ad1de835fe44e45884e8feae82a8f7f.png)
![](https://img.xkw.com/dksih/QBM/2015/6/26/1572148544200704/1572148549951488/STEM/969d60601118498b8f69259bbf56306d.png)
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解题方法
6 . 已知函数
的定义域为集合Q,集合
.
(1)若
,求
;
(2)若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c0cbd62ef927b03f055a7df6ad890f.png)
![](https://img.xkw.com/dksih/QBM/2015/1/15/1571963795464192/1571963801354240/STEM/74cfba9e20a04ea08b3ef678c479a175.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0710093dd2ae1efc992b92ce304807c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2158999fabb4246dbfd7d4a1dfea4d15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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7 . 已知函数
.
(1)用分段函数的形式表示该函数;
(2)在右边所给的坐标系中画出该函数的图象;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/21/216d6dc9-4655-495f-bd1c-0c9e06a754ba.png?resizew=179)
(3)写出该函数的定义域、值域、单调区间(不要求证明).
![](https://img.xkw.com/dksih/QBM/2015/1/5/1571946482991104/1571946488774656/STEM/383ff5371ea440ca8a77dccfed8d463c.png)
(1)用分段函数的形式表示该函数;
(2)在右边所给的坐标系中画出该函数的图象;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/21/216d6dc9-4655-495f-bd1c-0c9e06a754ba.png?resizew=179)
(3)写出该函数的定义域、值域、单调区间(不要求证明).
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13-14高一上·河北石家庄·期中
解题方法
8 . 已知集合
,集合
.
(1)若
,求
;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c46b47b6f9ec53a580fce1f21a36e8e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2467e99d070da1885cc7670bd9b34867.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ae2a5251c9ba2b87542a313d53c0526.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c88ed35dd48eada2d6761e524690e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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13-14高三上·甘肃临夏·期中
解题方法
9 . 记函数
的定义域为集合
,函数
的定义域为集合
.
(1)求
;
(2)若
,且
,求实数
的取值范围.
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571404579332096/1571404585066496/STEM/ebfd668491794d6f862560fc7fd69c72.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571404579332096/1571404585066496/STEM/5249f0ebcfb1410083411c9ebaf861fd.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571404579332096/1571404585066496/STEM/d4de99bdf19944649a171b3993bfe59a.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571404579332096/1571404585066496/STEM/bba2a44a885d44fc8a75aa254ac65f7b.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571404579332096/1571404585066496/STEM/08192b92e2764d82b153e198e05a6bc9.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571404579332096/1571404585066496/STEM/db391cbae9414be1af9e708275b497f3.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571404579332096/1571404585066496/STEM/4c3ca36d8ad34440a615bc9371bce71e.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571404579332096/1571404585066496/STEM/7d640a2ea88441eca42ebcebec051297.png)
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