解题方法
1 . 已知函数
存在两个极值点,若对任意满足
的
,均有
,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d68c527131297c50eb7237ac4e81b121.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54138e6f29c4aaacd0a6cf89d409c526.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b2755e84aeb379e0117e278f71ca0a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3cd1477bb23cb3a95f1483df0c01fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
2 . 已知函数
,其极大值点和极小值点分别为
,记点
,直线
交曲线
于点
,若存在常数
,使得
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ef3e79110067a46276f0869bea25af5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2790aecde6df3b05f195ab8daddb56be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7e11699fa0813a5e9d6baf694f5bf4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357924c44549675683398a0b7c9bcb26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
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3 . 已知
为锐角三角形的三个内角.
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c99d9baa17058766456877027b05c796.png)
(2)求
的最小值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c99d9baa17058766456877027b05c796.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681ec70411257b96d0f5bc56f8428397.png)
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4 . 下列说法正确的是( )
A.![]() ![]() ![]() ![]() |
B.在![]() ![]() ![]() |
C.15人围坐在圆桌旁,从中任取4人,他们两两互不相邻的概率是![]() |
D.已知函数![]() ![]() ![]() ![]() ![]() |
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