2023高三·全国·专题练习
名校
1 . 已知函数
有两条与直线
平行的切线,且切点坐标分别为
,则
的取值范围是 __ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/495c8e0a18a3997de12b60019adf1b10.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a025526cd1389a21ae165ff7b3230b28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb5e0977b1a3c23ccd96d296b76a56e.png)
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6卷引用:江西省萍乡市安源中学2022-2023学年高二下学期期末考试数学试题
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2 . 设
,
,
,
,
,
是正数,且
+
+
=10,
+
+
=40,
+
+
=20,则
=
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8cc0b4997cae4d8aec791a1d3923314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a881309775c3b6a9f4ed408838666342.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a476588acbf41d798cc234a52fa21a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ea3cc01ce7266cdf0fd73fd50d23c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30c8dd33020d47881d3173b13c890fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/835c12334b04044145ec9ce5ce9eb9ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5741d12b0d0be55980dd6bcff14d105b.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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