名校
1 . 设a为常数,函数
在区间
上恰有
个零点,求所有可能的正整数n的值组成的集合为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/171849cbf36955fcdad36feaf1cb5f88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c07c496500d66cbd74e1070e1c7c1d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e8936c9fe1e81726455908657a29fc.png)
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2 . 已知函数
,记
,
,
,
.
(1)若函数
的最小正周期为
,当
时,求
和
的值;
(2)若
,
,函数
有零点,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e4ba784116a3c5f7754007f486b19fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb61a448347a3f8c1f126d1c00730cc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f5389990c3a0c5373f3bd9fb2454c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6742e9ed66a1f97e3113bb404daf239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dcee772e6187ac31d7f8d69b0487000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce0dc28340738e090bd10d6d675d8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01151b583febd1b0e124419394664a76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
解题方法
3 . 已知函数
在区间
上有且仅有5个零点,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/782e045b33dbd187ff79132f716b56d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8601dcdd1fc4dd120159ca4ba2c63d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
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4 . 已知函数
.
(1)求函数
的最小正周期;
(2)若函数
,求函数
的单调递减区间;
(3)若函数
在区间
上有两个不等实根,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6935d70c7ee58241f49744b836bfa03c.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe16ca6da6c1fad48d0db3f6eafb7e6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c49ca8562b98657ca9c499093f7233.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa531b5e6e0208b2e7f8054999e52f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fa1eb837cea02a259834fc5bf25a052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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解题方法
5 . 已知
,有下列两个结论:
①设
的值域为A,则
;
②对于任意的正数a,
存在奇数个零点.
则下列判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4bb8c6c99901803f74342736b6a4dd.png)
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c23da5b9dfb07dfe68d89d46dd33c1.png)
②对于任意的正数a,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0384a0466920e5bf00231a5c5bf77969.png)
则下列判断正确的是( )
A.①②均正确 | B.①②均错误 | C.①对②错 | D.①错②对 |
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解题方法
6 . 已知
,若满足
(
互不相等),则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3bb4f72c8937cd296ac13d02f1a1323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6637110325fc5bcb6337762aecf53d4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ae24688d4c45aad43e9af0b7bbfda6b.png)
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7 . 关于
的方程
有两个不同实数根,则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec371cf0340e477b43ee05d27d86b33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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8 . 下列几个命题:
(1)第一象限的角是锐角;
(2)函数
在定义域内是增函数;
(3)函数
的零点是
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/232d1ce3ad14256b1543e6007ff1675d.png)
其中真命题的个数是( )
(1)第一象限的角是锐角;
(2)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fffa8ddcbbe89ab0f250f56673e2d36c.png)
(3)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83158ac8e214c8763863b22ddc82e03c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f231478aae94ebd6f1febcc8f08803.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/232d1ce3ad14256b1543e6007ff1675d.png)
其中真命题的个数是( )
A.0 | B.1 | C.2 | D.3 |
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名校
解题方法
9 . 已知函数
.
(1)当
时,求函数
的单调区间;
(2)若函数
在区间
上恰有一个零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee1a8bd934eeb2771c481add1cf4c98b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d47e734b17201fe992be7775714e9558.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
10 . 对于函数
,其中
,若关于
的方程
有两个不同的根,则实数
的取值范围是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7317c7e4b61d29469dcdeba41dbbb2c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa279306676cbc09ddcb9ff6f991a07a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次