已知
,函数
.
(1)当
时,求不等式
的解集;
(2)设
,
,若对任意的
,都有
,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f159847aac03a301d6ec4491ea49e3.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9a773447496b907b11192a0461616d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1409ec336465253241628bb2c31590f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1a8c69aaecfbe4d8bd7cf01a3b79c50.png)
更新时间:2019-12-04 16:10:37
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解答题-问答题
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解题方法
【推荐1】设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f9eb39492dff7103fdae3a0885049b5.png)
(1)求使
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(1)求使
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60c46227a0e2e211e9263b336f8150cb.png)
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较易
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【推荐2】已知集合
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ded6edf806e6570fd37fec8eaf374a0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e464c59b9ad370ebadfefbe856869728.png)
(1)求集合;
(2)已知集合,若集合
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解答题-证明题
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【推荐1】已知函数
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(1)若函数
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(2)用定义法证明:函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b9cc3fdb9fa82cdff3fed49e88d4fdd.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f786a5701dc1a8a015e8843c3360151b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ac16d9e3f3e192ae3a9315935f38155.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
(2)用定义法证明:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
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解答题-问答题
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解题方法
【推荐2】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05fea74be99db3d8acb7339750785f41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a70ea17ca52291174eca995b6fb345e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffad2c7be33e024e3fb89f067d135727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dd82b5223c2a708c1729db2a3750990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280e33a329e9c529ac45e7270f88b892.png)
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