解题方法
1 . 函数
的值域为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec732c73c3a015abb6679a045a89e8f.png)
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2 . 若正数
,
,
满足
,且
的最小值是4,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d65e4902acac49cf0cfb53587354a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f29d5f376c75c41ae6af0c8a8565449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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3 . 已知函数
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8ee93f7771f73f0303642db5783b21.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1854fd8bf76e74f6414fc8c9a77a0216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8ee93f7771f73f0303642db5783b21.png)
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4 . 若函数
的定义域为
,值域为
,则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58c65d71e57e6e7697e2f627dcd58583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d13d0b65cccde33e57652fc87471c1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13502d46b8563c54c09b29b20b3006a4.png)
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解题方法
5 . 已知
且
,则
的最大值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a9344f4fca7b9779ca7720e5277ea6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/131ac7eb1e911c9a40e84235bf3742ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c9768a9a6b76e56920be177831ab16.png)
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6 . 方程
的解集为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd8536a585142d325936f96683edc5b5.png)
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7 . 已知当
时,不等式
恒成立,则实数a的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74b6ce9accae1555dce9a443fda05acc.png)
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8 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/763d061631872c611d5662f7229127a6.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39b44ed068bce3a71927cf342fe06e8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/763d061631872c611d5662f7229127a6.png)
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9 . 若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f959c676ab8f896d6a2fae23dddaf90d.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9bc052a11cf1a01445992672dde2836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f959c676ab8f896d6a2fae23dddaf90d.png)
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10 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f27f930806d4ee1a6ac77a0fa6c340.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c9df49c32fa5cfd53197f65e1af42a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f27f930806d4ee1a6ac77a0fa6c340.png)
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