请阅读求绝对值不等式
和
的解的过程.
对于绝对值不等式
,从图1的数轴上看:大于
而小于
的数的绝对值小于
,所以
的解为
;
对于绝对值不等式
,从图2的数轴上看:小于
或大于
的数的绝对值大于
,所以
的解为
或
.
![](https://img.xkw.com/dksih/QBM/2021/9/3/2800256986374144/2804954765049856/STEM/55476157-9d67-4f6e-bd6f-e9428fd39d71.png?resizew=609)
(1)求绝对值不等式
的解
(2)已知绝对值不等式
的解为
,求
的值
(3)已知关于
,
的二元一次方程组
的解满足
,其中
是负整数,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cfcea73c1db2602a1e86712cb1a5d01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d1f58b806a0de27d9ae9adc8a3ec87b.png)
对于绝对值不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cfcea73c1db2602a1e86712cb1a5d01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cfcea73c1db2602a1e86712cb1a5d01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f57158d9520eff8d257bed880c64d6.png)
对于绝对值不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d1f58b806a0de27d9ae9adc8a3ec87b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d1f58b806a0de27d9ae9adc8a3ec87b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75e1512c67e2f7696e7558b43b954641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752455799e49f846e2601304fec5d3b8.png)
![](https://img.xkw.com/dksih/QBM/2021/9/3/2800256986374144/2804954765049856/STEM/55476157-9d67-4f6e-bd6f-e9428fd39d71.png?resizew=609)
(1)求绝对值不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e68645a712f9233060774e4e717c07.png)
(2)已知绝对值不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a14ea7d29e1b91908b82ccaa362b33b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76bfa82d5295d45e22465c21a4562ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ec08be6e5edde3502faba89bb505e0.png)
(3)已知关于
![](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/2bb960901daf5a789d532c95c63c65ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca3c8d65ce3cb232e09e416c281f408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2021-09-10 09:17:59
|
相似题推荐
解答题-证明题
|
较难
(0.4)
名校
【推荐1】如图,在平面直角坐标系中,长方形ABCD的顶点A(a,0),B(b,0)在坐标轴上,C的纵坐标是2,且a,b满足式子:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37573876553bb45b093489dcec509f8c.png)
(1)求出点A、B、C的坐标.
(2)连接AC,在y轴上是否存在点M,使△COM的面积等于△ABC的面积,若存在请求出点M的坐标,若不存在请说明理由.
(3)若点P是边CD上一动点,点Q是CD与y轴的交点,连接OP,OE平分∠AOP交直线CD于点E,OF⊥OE交直线CD于点F,当点P运动时,探究∠OPD和∠EOQ之间的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37573876553bb45b093489dcec509f8c.png)
(1)求出点A、B、C的坐标.
(2)连接AC,在y轴上是否存在点M,使△COM的面积等于△ABC的面积,若存在请求出点M的坐标,若不存在请说明理由.
(3)若点P是边CD上一动点,点Q是CD与y轴的交点,连接OP,OE平分∠AOP交直线CD于点E,OF⊥OE交直线CD于点F,当点P运动时,探究∠OPD和∠EOQ之间的数量关系,并证明.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/29/846a3fca-541b-4856-971b-c1f65188ea61.png?resizew=452)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】在平面直角坐标系
中,对于点
,给出如下定义:当点
满足
时,称点
是点
的等和点,已知点
.
(1)在
中,点
的等和点有__________;
(2)点
在直线
上,若点
的等和点也是点
的等和点,求点
的坐标;
(3)已知点
和线段
,点C也在 x轴上且满足
,线段
上总存在线段
上每个点的等和点.若
的最小值为5,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84bd36d19352628cb54c214436ee3322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27bd43bc4af1e3b28d0de0cc561b879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/021044b4285c4fd3d5d80bc5bba561b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/521d2cbdff8483ebba708857163ef1d9.png)
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeff453b8d7a46430533ff4b3f64118f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1882d2f789de61b5b7e3ec952e13b99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3dd1ffa1d71ff9b4165ab7569a4ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】解下列不等式,并把解集在数轴上表示出来.
(1)5(x﹣1)≤3(x+1)
(2)
﹣
>﹣2
(3)
(1)5(x﹣1)≤3(x+1)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54eac68f4a19877780e2f789738626ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e77ae4a3121e14a26cd9258333f37c1a.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d451fc076374a802cc57b3265fe03df.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】解下列不等式(组),并把解集在数轴上表示出来:
(1)
-x>1;
(2)
;
(3)
;
(4)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49fd2540028bbace222e8bb03a01c2f7.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa3b5af2c2f3e334bcee3c349593951.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec7502ff3a0838071bb15b1c30c4584d.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b05043b6885b4dd6c6b154cb3b5b6f7.png)
您最近一年使用:0次
解答题-作图题
|
较难
(0.4)
真题
【推荐3】数和形是数学的两个主要研究对象,我们经常运用数形结合、数形转化的方法解决一些数学问题.下面我们来探究“由数思形,以形助数”的方法在解决代数问题中的应用.
探究一:求不等式
的解集
(1)探究
的几何意义
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/ff6eb6147e184967b84d0f8af8674052.png)
如图①,在以O为原点的数轴上,设点A'对应点的数为
,由绝对值的定义可知,点A'与O的距离为
,
可记为:A'O=
.将线段A'O向右平移一个单位,得到线段AB,,此时点A对应的数为
,点B的对应数是1,
因为AB= A'O,所以AB=
.
因此,
的几何意义可以理解为数轴上
所对应的点A与1所对应的点B之间的距离AB.
(2)求方程
=2的解
因为数轴上3与
所对应的点与1所对应的点之间的距离都为2,所以方程的解为![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/04656eaf8fa24dd98a9b7aa2f2048f0d.png)
(3)求不等式
的解集
因为
表示数轴上
所对应的点与1所对应的点之间的距离,所以求不等式解集就转化为求这个距离小于2的点所对应的数
的范围.
请在图②的数轴上表示
的解集,并写出这个解集
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/0fe5e3c413654274adf2ff2cd8574c91.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/24dee8a4a4d846c7a1d671ecf20ebbe1.png)
探究二:探究
的几何意义
(1)探究
的几何意义
如图③,在直角坐标系中,设点M的坐标为
,过M作MP⊥x轴于P,作MQ⊥y轴于Q,则点P点坐标(
),Q点坐标(
),|OP|=
,|OQ|=
,
在Rt△OPM中,PM=OQ=y,则![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/b91e112abfe44c1f8185a6f6eef884d8.png)
因此
的几何意义可以理解为点M
与原点O(0,0)之间的距离OM
(2)探究
的几何意义
如图④,在直角坐标系中,设点 A'的坐标为
,由探究(二)(1)可知,
A'O=
,将线段 A'O先向右平移1个单位,再向上平移5个单位,得到线段AB,此时A的坐标为(
),点B的坐标为(1,5).
因为AB= A'O,所以 AB=
,因此
的几何意义可以理解为点A(
)与点B(1,5)之间的距离.
(3)探究
的几何意义
请仿照探究二(2)的方法,在图⑤中画出图形,并写出探究过程.
(4)
的几何意义可以理解为:_________________________.
拓展应用:
(1)
+
的几何意义可以理解为:点A
与点E
的距离与点AA
与点F____________(填写坐标)的距离之和.
(2)
+
的最小值为____________(直接写出结果)
探究一:求不等式
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/e3cd543d3bc54393a43eb7e3e16d05a7.png)
(1)探究
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/23478f82f1504236a2bb2be0226c8d4c.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/ff6eb6147e184967b84d0f8af8674052.png)
如图①,在以O为原点的数轴上,设点A'对应点的数为
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/7daf9e24d82a40c4890a27b7642fe953.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/23478f82f1504236a2bb2be0226c8d4c.png)
可记为:A'O=
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/23478f82f1504236a2bb2be0226c8d4c.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/fbfd31b62e304acd8af885ea3c8359de.png)
因为AB= A'O,所以AB=
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/23478f82f1504236a2bb2be0226c8d4c.png)
因此,
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/23478f82f1504236a2bb2be0226c8d4c.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/fbfd31b62e304acd8af885ea3c8359de.png)
(2)求方程
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/23478f82f1504236a2bb2be0226c8d4c.png)
因为数轴上3与
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/a7b4bab401a04c64925fde80e4137d6b.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/04656eaf8fa24dd98a9b7aa2f2048f0d.png)
(3)求不等式
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/e3cd543d3bc54393a43eb7e3e16d05a7.png)
因为
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/23478f82f1504236a2bb2be0226c8d4c.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/fbfd31b62e304acd8af885ea3c8359de.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/fbfd31b62e304acd8af885ea3c8359de.png)
请在图②的数轴上表示
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/e3cd543d3bc54393a43eb7e3e16d05a7.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/0fe5e3c413654274adf2ff2cd8574c91.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/24dee8a4a4d846c7a1d671ecf20ebbe1.png)
探究二:探究
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/8ad9bddb429e4be9ab5b8f9027dee861.png)
(1)探究
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/426fcf8b42694b70a006d366a2c2a341.png)
如图③,在直角坐标系中,设点M的坐标为
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/685c24345a92440f891d9b5ca80c0711.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/44cfedbc3b864879aae0d325e72c982f.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/591fd97985994d0eb8697d1a391fee73.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/fbfd31b62e304acd8af885ea3c8359de.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/e8f32d99314b4901af88b17995caa843.png)
在Rt△OPM中,PM=OQ=y,则
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/b91e112abfe44c1f8185a6f6eef884d8.png)
因此
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/426fcf8b42694b70a006d366a2c2a341.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/685c24345a92440f891d9b5ca80c0711.png)
(2)探究
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/68a5ee509c4145f68783529155aa5b2e.png)
如图④,在直角坐标系中,设点 A'的坐标为
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/3eb4fa1093df4474a5630c61f4286d80.png)
A'O=
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/68a5ee509c4145f68783529155aa5b2e.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/922525d67d0e429d887b17f43f104c4f.png)
因为AB= A'O,所以 AB=
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/68a5ee509c4145f68783529155aa5b2e.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/68a5ee509c4145f68783529155aa5b2e.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/922525d67d0e429d887b17f43f104c4f.png)
(3)探究
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/5dae9fd8e78b447a9280a5e35446c288.png)
请仿照探究二(2)的方法,在图⑤中画出图形,并写出探究过程.
(4)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/8ad9bddb429e4be9ab5b8f9027dee861.png)
拓展应用:
(1)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/8ba32fc631774d81b22d5e1beb75f729.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/592d5c91cab146d2b68b77bdb0941b62.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/685c24345a92440f891d9b5ca80c0711.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/2e7daab051c54e619cda1165a9b5347d.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/685c24345a92440f891d9b5ca80c0711.png)
(2)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/8ba32fc631774d81b22d5e1beb75f729.png)
![](https://img.xkw.com/dksih/QBM/2017/7/28/1773763319513088/1773763319840768/STEM/592d5c91cab146d2b68b77bdb0941b62.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】在平面直角坐标系
中,已知点
,
的半径为1,过
外一点
作两条射线,一条是
的切线,另一条经过点
,若这两条射线的夹角大于或等于
,则称点
为
的“伴随点”.
(1)当
时,
①在
,
,
,
中,
的“伴随点”是______.
②若直线
上有且只有一个
的“伴随点”,求
的值;
(2)已知正方形
的对角线的交点
,点
,若正方形上存在
的“伴随点”,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439e95540157803d4ac3cf61a49f50a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aeb9a94e392f6759b18abed89aacc5e.png)
①在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42795469ed8ba12729fcebd710e8795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/903098ead0cfa36d17bad5594ef4ee53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edeeaed91d3f027bc045c16f84ef1fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6879faf4c509a20be1f46f421ef3cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
②若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87490be8d0cdb7bc6c39d1a37f3bc335.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)已知正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369ad3bed780a85cd6fcbb1d682af042.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdbee11d881fc85b8b4e7ebc72209e97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】二次函数
的顶点
是直线
和直线
的交点.
(1)用含
的代数式表示顶点
的坐标.
(2)①当
时,
的值均随
的增大而增大,求
的取值范围.
②若
,且
满足
时,二次函数的最小值为
,求
的取值范围.
(3)试证明:无论
取任何值,二次函数
的图象与直线
总有两个不同的交点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2630d6cf14b3e8c82ee7080799901b8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38cd2a180ae300bbf2388a709e4c28e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54479885d4ab2f717d2e97718da04b43.png)
(1)用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27f27cbb8185c1974d715ff95f8801c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2630d6cf14b3e8c82ee7080799901b8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3967d620e2fef3ecc724c66e29f68a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a969a07b447f878e18412ed7b12c5c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)试证明:无论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2630d6cf14b3e8c82ee7080799901b8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54479885d4ab2f717d2e97718da04b43.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐3】在平面直角坐标系xOy中,定义:d=|x1-x2|+|y1-y2|为P(x1,y1),Q(x2,y2)两点之间的“曼哈顿距离”,并称点P与点Q是“d关联”的.例如:若点M的坐标为(-1,2),点N的坐标为(1,3),则点M与点N之间的“曼哈顿距离”为d=|-1-1|+|2-3|=3,且点M与点N是“3关联”的.
(1)在D(2,0),E(1,-2),F(-1,-1),G(-0.5,1.5)这四个点中,与原点O是“2关联”的点是_______;(填字母)
(2)已知点A(-2,1),点B(0,t),过点B作平行于x轴的直线l.
①当t=-1时,直线l上与点A是“2关联”的点的坐标为_________;
②若直线l上总存在一点与点A是“2关联”的,直接写出t的取值范围.
(1)在D(2,0),E(1,-2),F(-1,-1),G(-0.5,1.5)这四个点中,与原点O是“2关联”的点是_______;(填字母)
(2)已知点A(-2,1),点B(0,t),过点B作平行于x轴的直线l.
①当t=-1时,直线l上与点A是“2关联”的点的坐标为_________;
②若直线l上总存在一点与点A是“2关联”的,直接写出t的取值范围.
您最近一年使用:0次