化简
,并判断当x满足不等式
时该代数式的符号.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9062bea1f32f8f1322725e9cbd68fdb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c121f153a1b799e3f749281fc454a5f.png)
更新时间:2020-05-15 19:12:03
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相似题推荐
解答题-问答题
|
较难
(0.4)
解题方法
【推荐1】对于一个数x,我们用
表示小于x的最大整数,例如:
,
.
(1)填空:
________,
________,
________;
(2)若a,b都是整数,且
和
互为相反数,求代数式
的值;
(3)若
,求x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/991eefd03c1b54f58cdb3105b4815173.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891ffca265ed26ae5e4acff8b47230ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eef74eb3540de2468d56e66f9eb8793.png)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e33866fcdf6c803ac48642c2438bd0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/007719c7320e6b813c2954dc1c6cf9fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3df6affb1f22b5e216a4104f902ccf7.png)
(2)若a,b都是整数,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c20916fd07cbf87fe1edfe7ab5d957dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a835401bdbfed5c5afe05a5aedef73d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f20ab6e8b829f9a09f9360b0340b4e8f.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/569ca7ac703c86282fbf252322c2d120.png)
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解答题-问答题
|
较难
(0.4)
名校
【推荐2】在平面直角坐标系xOy中,称过点
且与y轴平行的直线为直线
,对于任意图形G,给出如下定义:将图形G先沿直线
翻折得到图形
,再将图形
沿第一、三象限的角平分线翻折得到图形
,则称图形
是图形G的单变换图形,图形
是图形G的双变换图形.
已知点
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/544bb52c8770f49e65a57a9cd5a7a5c9.png)
(1)当
时,点C的单变换图形点
的坐标为__________,双变换图形点
的坐标为__________;
(2)用含m的式子表示点C的双变换图形点
的坐标为__________.
(3)当
单变换图形
与双变换图形
有公共点时,求出m的取值范围;
(4)若
的双变换图形上只存在两个与x轴的距离为2的点,直接写出m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9c0002b13f6cae093cd9dc9f19941b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d71f015144ffaf1faec94a259b4a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d71f015144ffaf1faec94a259b4a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011ae6cb0cf49f6d3d19b485dc1cfc22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011ae6cb0cf49f6d3d19b485dc1cfc22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fda993d38532293724009685288b72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011ae6cb0cf49f6d3d19b485dc1cfc22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fda993d38532293724009685288b72.png)
已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d395d7e72a0fa0ae4474f818e6aeffa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51022a5505d1d688fa915c839ad909b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/544bb52c8770f49e65a57a9cd5a7a5c9.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)用含m的式子表示点C的双变换图形点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011ae6cb0cf49f6d3d19b485dc1cfc22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fda993d38532293724009685288b72.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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