先阅读第(1)题解法,再解答第(2)题:
(1)已知
是有理数,并且满足等式
,求
的值.
解:因为
,所以![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82ee952d6342898ba667f4f852899a41.png)
所以
,解得
.
(2)已知
是有理数,并且满足等式
,求
的值.
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e66ad23eb8fc70ebad9225faf3202f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
解:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e66ad23eb8fc70ebad9225faf3202f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82ee952d6342898ba667f4f852899a41.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1df35cdabd2e1a0d4d9796d1db1d7c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbb26529a9582def32b79de03abffb7.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4c160faac60919e577e3a498d9e0fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
更新时间:2023-06-29 22:37:58
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解答题-问答题
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适中
(0.65)
【推荐1】如图1,O为平面直角坐标系的原点,点A坐标为(4,0),同时将点A,O分别向上平移2个单位,再向左平移1个单位,得到对应点B,C.
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(1)求四边形OABC的面积;
(2)在y轴上是否存在一点M,使△MOA的面积与四边形OABC的面积相等?若存在这样一点,求出点M的坐标,若不存在,请说明理由;
(3)如图2,点P在OA边上,且∠CBP=∠CPB,Q是AO延长线上一动点,∠PCQ的平分线CD交BP的延长线于点D,在点Q运动的过程中,求∠D和∠CQP的数量关系.
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(1)求四边形OABC的面积;
(2)在y轴上是否存在一点M,使△MOA的面积与四边形OABC的面积相等?若存在这样一点,求出点M的坐标,若不存在,请说明理由;
(3)如图2,点P在OA边上,且∠CBP=∠CPB,Q是AO延长线上一动点,∠PCQ的平分线CD交BP的延长线于点D,在点Q运动的过程中,求∠D和∠CQP的数量关系.
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解答题-问答题
|
适中
(0.65)
【推荐2】已知
,
为常数,对实数
,
定义,我们规定
运算为:
,这里等式右边是通常的代数四则运算,例如:
若
,
.
(1)求常数
,
的值;
(2)若关于
的不等式组
恰好有
个整数解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.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/26f7fb23d83b1308a6c250103d06536a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9455ebad8f0697ca62c17eaf13f9a575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44da6194ff5c4e6f97d65c1cc1e5761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6830b07098e70ea0ef1ac8f3a73b0589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389548e6389ee8db3f0a6344d2406eb4.png)
(1)求常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e9581d426e8da64ba5ea5c746d1c3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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