解题方法
1 . 若
,则
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08d0927085e4dfbf6fa021a48045aa67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e8f20810271dba4f54e99b23896404f.png)
A.9 | B.6 | C.3 | D.1 |
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名校
2 . 某种绿茶泡茶的最佳水温为85℃,饮茶的最佳温度为60℃.在标准大气压下,水沸腾的温度为100℃.把水煮沸后,在其冷却的过程中,只需要在最佳温度对应的时间泡茶、饮茶,就能喝到一杯好茶.根据牛顿冷却定律,一个物体温度的变化速度与这一物体的温度和所在介质温度的差值成比例,物体温度
与时间
的函数关系式为
,其中
为介质温度,
为物体初始温度.为了估计函数中参数
的值,某试验小组在介质温度
和标准大气压下,收集了一组数据,同时求出对应参数
的值,如下表,
现取其平均值作为参数
的估计值,假设在该试验条件下,水沸腾的时刻为0,则泡茶和饮茶的最佳时间分别是( )(结果精确到个位数)
参考数据:
,
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2709ca478fb15ea08e8aa55328eae8e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5617528c9a89334f4e647cb61ac8d04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9a7e0e5238148676a584b1748e04d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/635ccd929471d564cc9d2d96266b34d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec9a78dd4908c74a64f2f8e3c8ad0b95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
时间/min | 0 | 1 | 2 | 3 | 4 | 5 |
茶温/℃ | 85.0 | 79.2 | 74.8 | 71.3 | 68.3 | 65.9 |
![]() | —— | 0.9045 | 0.9122 | 0.9183 | 0.9227 | 0.9273 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d842673d79eb00f15152551900d2d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5613d22f9ada8d6ba67259ed64da3092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64544e4844d1b0b7ba069359f4c30c8e.png)
A.3min,9min | B.3min,8min |
C.2min,8min | D.2min,9min |
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4卷引用:江西省赣州市十六县市二十校2023届高三上学期期中联考数学(理)试题
3 . 已知函数
,则对任意实数
,有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d287831cf95944ec18fbb6be1f4694c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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4 . 已知函数
,且
.
(1)若
的图象在点
处的切线方程为
,求a与b的值;
(2)若
与
的图象有两个不同的交点
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9878ad2b8f035323b07d93a6a793878.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea59cee971344ed593ff082a65d177c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bebb3b7f47e0decd48e64cb32aaa5903.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c035bfd800397b80370ead0f57e9f2c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56720e2f2b0ddd72156da495923698da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2852ae85cfcc804b3192ea8543c88938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81be1cde73bf30aab41df006f021f591.png)
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解题方法
5 . 已知非零向量
,
满足
,且
,则
与
的夹角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b982e3d8f4df04309a922a4872dac4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73ac1449db8dc19a879c1cae099a95ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
6 . 已知
为偶函数.
(1)求
的值;
(2)已知函数
的定义域为
,
,当
时,
,若对任意的
,都有
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb17b82bda4775d92390909352409ff.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ca5e984d5e14b4be18a5ee99f80a4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f549323396b3c0ca33891ca66a5afb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389c07d27ee85fc5eb2203cd15710601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d1a94ea3c278c2197572cc1b7725b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8685b6c5b77d4c5cf1c84abdd3c7da15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f1a0215273a1071995d11791c49c21c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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4卷引用:江西省赣州市十六县市二十校2023届高三上学期期中联考数学(理)试题
江西省赣州市十六县市二十校2023届高三上学期期中联考数学(理)试题山东省济南市章丘区2022-2023学年高三上学期诊断性测试数学试题江苏省徐州市沛县2022-2023学年高一上学期12月月考数学试题 (已下线)高一数学上学期期末【全真模拟卷03】-2022-2023学年高一数学考试满分全攻略(人教A版2019必修第一册)
名校
7 . 设公比为
的等比数列
的前
项和为
,前
项积为
,且
,
,
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8141d87fb02b08c88b0c9f27f839a7d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b49f1249f5c5177133dfae08ed3793e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/691a228f493f232d01cc2c13714d4ed6.png)
A.![]() | B.![]() |
C.![]() ![]() | D.数列![]() |
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江西省赣州市十六县市二十校2023届高三上学期期中联考数学(理)试题福建省龙岩市非一级达标校2023届高三上学期期中联考数学试题江西省赣州市教育发展联盟2023届高三上学期第9次联考(12月)数学(文)试题江西省赣州市教育发展联盟2023届高三上学期第9次联考(12月)数学(理)试卷(已下线)模块二 数列 不等式-2(已下线)第03讲 等比数列及其前n项和(九大题型)(讲义)-3广东省广州市广雅中学2024届高三上学期第二次调研数学试题(已下线)专题5-1 等差等比性质综合-1
解题方法
8 . 已知数列
的前
项和为
,
,且
.
(1)求
的通项公式;
(2)若
是
,
的等比中项,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3b29d01147fadcffc5418b1f4ac0d1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0441e285d990afd18061376145503267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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解题方法
9 .
的内角A,B,C的对边分别为a,b,c,已知
,c是a,b的等比中项,且
的面积为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892560dcff6af9f66a3f735652f69dd7.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65889da60ffeb2e866b97ea0dd9e8ebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892560dcff6af9f66a3f735652f69dd7.png)
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10 . 已知正数
,
满足
,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/a2d44fec09cd37cf3a0b1fadbea1781e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f0281e6bbdbe08beeccb55adf84536.png)
A.3 | B.6 | C.9 | D.12 |
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