已知函数
,则关于方程
,下列说法错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0be14c776f25b719c1a5c50d5faea3b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52889d0a41265116d1bcaeb78b6a1ac1.png)
A.上述方程没有实数根的充分不必要条件是![]() |
B.若a=1,b=1,c=![]() |
C.若a=1,b=![]() ![]() ![]() |
D.若a=2,b=3,c=1,则方程有3个根,且满足所有根的和为3 |
更新时间:2021-01-06 22:57:28
|
【知识点】 函数与方程的综合应用
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A.![]() | B.![]() | C.![]() | D.![]() |
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A.14 | B.12 | C.10 | D.8 |
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