设函数
,若方程
恰有两个不相等的实根
,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9854df3a10a4e713e6e818917f6e0159.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0c9a7fac460672b020c9ca97a0bed14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b6aebd438d53feb8e2081624e3a5015.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2017-05-15 23:21:38
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名校
解题方法
【推荐1】已知函数
,若函数
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,
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,且
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【推荐2】已知函数f(x)
函数g(x)=f(x)﹣2x恰有三个不同的零点,则实数a的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/475971915dad25773096baa69ed7edb1.png)
A.[﹣1,3) | B.[﹣3,﹣1] | C.[﹣3,3) | D.[﹣1,1) |
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【推荐1】对任意
,若不等式
恒成立,则
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
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【推荐2】已知函数
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