解题方法
1 . 求不等式的解集(写出必要的过程)
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a35555979ecc0abb9ce17e2fc8eacc44.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a35555979ecc0abb9ce17e2fc8eacc44.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b04398439d2a7867cf0a413edd40383.png)
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2 . 若函数
,
,
,则由表中数据确定
、
、
依次对应( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8a93f64c26b256e240209924618b751.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d4da2862522175efe66bea93c14d05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108990a131bca055557b034d893bfe52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
x | |||
1 | 2 | 0.2 | 0.2 |
5 | 50 | 25 | 3.2 |
10 | 200 | 200 | 102.4 |
A.![]() ![]() ![]() | B.![]() ![]() ![]() |
C.![]() ![]() ![]() | D.![]() ![]() ![]() |
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