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1 . 用反证法证明命题“已知
,
,
,则
,
中至多有一个不小于0”时,假设正确的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a186fd1aacdd941fcae9aaf267f3cbbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9b1561bc347b4255441937f5d790cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
A.假设![]() ![]() | B.假设![]() ![]() |
C.假设![]() ![]() | D.假设![]() ![]() |
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2019-05-30更新
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7卷引用:【市级联考】河北省邢台市2018-2019学年高二下学期第三次月考数学(文)试题