1 . 牛顿迭代法是我们求方程近似解的重要方法.对于非线性可导函数
在
附近一点的函数值可用
代替,该函数零点更逼近方程的解,以此法连续迭代,可快速求得合适精度的方程近似解.利用这个方法,解方程
,选取初始值
,在下面四个选项中最佳近似解为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4288ce7da394135a8c5b0b067d384d09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910717f3df9f31b0ff377f65a16a4ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e099a6abe3e9566b2ad385906e323fc.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 正整数a、b满足1<a<b,若关于x、y的方程组
且只有一组解,则a的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a62d7cc776503fe56e52111eb1072ae0.png)
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3 . 正整数
、
满足
,若关于
、
的方程组
有且只有一组解,则
的最大值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63478e7cf55bad51bbd4ce1e23363e75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a94f27a946a256e802ab135502b5960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2020-02-03更新
|
99次组卷
|
3卷引用:2016届上海市高考压轴数学试题
名校
4 . 已知关于
、
的方程组
有无穷多组解,则实数
的值为___
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/505c27dd9fac80566494985aa1d06eb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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5 . 已知函数
为
上的偶函数,
为
上的奇函数,且
,记
.
(1)求
的最小值;
(2)解关于
的不等式
;
(3)设
,若
的图象与
的图象有2个交点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfd6c5d5713df54f8c8955eb5ddaf2c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b94fee1c22dddbea8da6c3c9973e17b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c388166862b3ccfcc7ca749ebe5949.png)
(2)解关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305e0a1eba7fb1b7bfe8bdbdce1df9d6.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee04cc7d647e23c522c0e7af3b405575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c388166862b3ccfcc7ca749ebe5949.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5790d5181783c15fd46d95bf18b796f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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6 . 设
且
,
,已知函数
.
(1)当
时,求不等式
的解;
(2)若函数
在区间
上有零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/995ec593baa4ef50b6d87c78380953d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/086244b1b7904e6d967a8c0daa826f57.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1d86b4ad722d7b720603eba9d330fd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b4955c5adc717b7f6f0b975e0724ff5.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2203b1906da60b21c8b7bd27aa8f209c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/040d7a53373b15ed20cb8bce3996399f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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解题方法
7 . 已知函数
.
(1)解不等式
;
(2)若函数
存在零点,求
的求值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eb4f2298a6db00d5976d61d9c21c17b.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e586b443d0bab95ca3c85c0c07bc5e95.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcefa1eadaa807e3fe6c61a2f8d2dea9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
8 . 已知
,若关于x的不等式
恰好有6个不同的实数解,则a的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369df406af131f8054ddd52d15642c92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47666f79062de0a97dfbe791aeaabb66.png)
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2023-05-06更新
|
493次组卷
|
3卷引用:山西省阳泉市2023届高三三模数学试题
名校
9 . 已知函数
,
,其中
.
(1)若方程
在
(
为自然对数的底数)上存在唯一实数解,求实数a的取值范围;
(2)若存在
,使不等式
成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/740a91392d3d5fb1cdf10436e3829794.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a3d7b6e442c071058580d95f9e239c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44aca6c00903b9dd306287ba3bb91035.png)
(1)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9587df831df1af5e7dd6be5fdc7bd8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d47e734b17201fe992be7775714e9558.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(2)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ccc99093ff159b3f94de7033dadde16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d3a6b1966bfca879c8de2e46048eb24.png)
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10 . 已知函数
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c779fc5b4926c5bee16422107a90c47.png)
A.若函数![]() ![]() ![]() |
B.关于![]() ![]() ![]() |
C.对于实数![]() ![]() |
D.当![]() ![]() ![]() ![]() |
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