对于三次函数
,定义:设
是函数
的导数
的导数,若方程
有实数解
,则称点
为函数
的“拐点”.有同学发现“任何一个三次函数都有‘拐点’;任何一个三次函数都有对称中心;且‘拐点’就是对称中心.”请你将这一发现视为条件,若函数
,则它的对称中心为______ ;并计算![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc3965889cd32086bc4d5dbd0852ce2.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/012429b7101ba0f84e7b45598ed12db9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10acd6d864583617dd3e71240bf0c857.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df1fa6ca9eb7cea9131dad36db6a0ac6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43db00e106c7d08a76a7ba71ca5e63d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caee85afb9ed62666b9e101276c68dea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc3965889cd32086bc4d5dbd0852ce2.png)
更新时间:2022-04-21 12:56:39
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名校
【推荐1】牛顿迭代法又称牛顿
拉夫逊方法,它是牛顿在17世纪提出的一种在实数集上近似求解方程根的一种方法.具体步骤如下:设
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的一个零点,任意选取
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,记
与
轴交点的横坐标为
,并称
为
的
次近似值.设
的零点为
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的2次近似值为 _____ .
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【推荐2】设函数
在区间
上的导函数为
,
在区间
上的导函数为
,若区间
上
.则称函数
在区间
上为“凹函数”,已知
在
上为“凹函数”则实数m的取值范围为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
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