若
是方程
的两个根,且
,则
的值为( )
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761028472832/1773761028669440/STEM/d2df72c4510c4ff99e2f9b9675cb6bfc.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761028472832/1773761028669440/STEM/7542fb0acdf24c08963cea8768f39241.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761028472832/1773761028669440/STEM/bc6a524e92294ded809d1e93ed356570.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761028472832/1773761028669440/STEM/ce132aea9047453ca86a1b70fc2fc1a4.png)
A.![]() | B.1或![]() | C.![]() | D.1 |
更新时间:2017-08-01 15:44:01
|
【知识点】 一元二次方程的根与系数的关系解读
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