关于
的二元一次方程组
有唯一一组正解,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d5a63d9eb8d39a50f193b6ebebb296.png)
更新时间:2020-06-26 10:56:58
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相似题推荐
解答题-问答题
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适中
(0.65)
名校
【推荐1】已知关于
的一元二次方程
的两个实根是
、
.
(1)求
的取值范围;
(2)是否存在
,使得
?若存在,求
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515de4d1616e4d13cd2c275c3e3cd44c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20fef976a0230bdfe3bc758e93987ba8.png)
(2)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3114a015309bae7a0ce9f149bcb92384.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解答题-证明题
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解题方法
【推荐2】(1)已知
,求
的取值范围;
(2)若
,求证:
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a9ab6b936685c54f65889feef23a43f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af843f03248254832458e9a803d8bc1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/353a0504082335c98b71653317beabbe.png)
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适中
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【推荐2】已知直线
:
,
:
,分别求实数
满足什么条件时,直线
与
相交?平行?重合?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/259d2872f99edd33cb86606f893dda7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2420fa00946ed936cd1a650c77a56f4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
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