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1 2.关于函数 f(x)=1/4(x-1/x)-lnx 的零点,下列说法正确的A.函数f(x)有两个零
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1 2.关于函数 f(x)=1/4(x-1/x)-lnx 的零点,下列说法正确的A.函数f(x)有两个零点B.函数f(x)有一个零点C.函数f(x)没有零点D.无法确定函数f(x)的零点A.函数f(x)有两个零点v![](https://s.bdstatic.com/common/openjs/emoticon/img/face_02.png)
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咨询记录 · 回答于2023-05-26
1 2.关于函数 f(x)=1/4(x-1/x)-lnx 的零点,下列说法正确的A.函数f(x)有两个零
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1 2.关于函数 f(x)=1/4(x-1/x)-lnx 的零点,下列说法正确的A.函数f(x)有两个零点B.函数f(x)有一个零点C.函数f(x)没有零点D.无法确定函数f(x)的零点A.函数f(x)有两个零点v![](https://s.bdstatic.com/common/openjs/emoticon/img/face_02.png)
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函数(function),数学术语。其定义通常分为传统定义和近代定义,函数的两个定义本质是相同的,只是叙述概念的出发点不同,传统定义是从运动变化的观点出发,而近代定义是从集合、映射的观点出发。函数的近代定义是给定一个数集A,假设其中的元素为x,对A中的元素x施加对应法则f,记作f(x),得到另一数集B,假设B中的元素为y,则y与x之间的等量关系可以用y=f(x)表示,函数概念含有三个要素:定义域A、值域B和对应法则f。其中核心是对应法则f,它是函数关系的本质特征![](https://s.bdstatic.com/common/openjs/emoticon/img/face_02.png)
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