1 . 下列四个函数中,以
为最小正周期,且在区间
上单调递减的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f5389990c3a0c5373f3bd9fb2454c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/318a8ce8dfe80dcdf2074a585ef575f9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 《几何原本》中的几何代数法是以几何方法研究代数问题,这种方法是数学家处理问题的重要依据,通过这一原理,很多的代数公理或定理都能够通过图形实现证明,也称之为无字证明.现有图形如图所示,
为线段
上的点,且
,
,
为
的中点,以
为直径作半圆,过点
作
的垂线交半圆于
,连接
、
、
,过点
作
的垂线,垂足为
.则该图形可以完成的所有的无字证明为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/4272bf6b-79fe-408d-88e6-847d0dfd3540.png?resizew=162)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3d296e0d7154a170cb7d3ae42989b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a88b719166fcc1431f876bc8c5656c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/4272bf6b-79fe-408d-88e6-847d0dfd3540.png?resizew=162)
A.![]() | B.![]() |
C.![]() | D.![]() |
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3 . 已知
且
,则下列函数的图象过定点
的有( )
![](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/5265d99095b635f62c7915298ec0e963.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
4 . 下列说法正确的有( )
A.若![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
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5 . 已知函数
,
,设
.
(1)求
的定义域;
(2)判断
的奇偶性,并说明理由;
(3)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35dd621776dee688a0175a1abe39c258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4741b2cc342a055aefb2d825e45ce77e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa662f0273f0921c1fa4727f632395.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cc2395f479a7f620dc7a8168f87adef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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6 . 若关于
的不等式
恒成立,则实数
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1ea7efc308d07494d869e4657b6a431.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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7 . 某公园池塘里浮萍的面积
(单位:
)与时间
(单位:月)的关系如下表所示:
现有以下两种函数模型可供选择:①
,②
,其中
,
,
,
,
均为常数,
且
.
(1)直接选出你认为最符合题意的函数模型,并求出
关于
的函数解析式;
(2)若该公园池塘里浮萍的面积蔓延到
,
,
所经过的时间分别为
,
,
,写出一种
,
,
满足的等量关系式,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c901bcdfa58f0c68ad0161b0bab269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
时间![]() | 1 | 2 | 3 | 4 |
浮萍的面积![]() | 3 | 5 | 9 | 17 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c4482d7450f7dce775f45b1c210bc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d5f0838e60c83aee4193151184f8e2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
(1)直接选出你认为最符合题意的函数模型,并求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)若该公园池塘里浮萍的面积蔓延到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3edcc2953a799d15bbb489a1ddfdf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481b585dca059de8214799b47422a9d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7586a5d9e4572ebeed394e949d1262fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c7eb49a823f757461cd5260757b088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd84a8f95166367063218ee03ffd5a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db31d2bbc9b044646fd026f239e7b62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c7eb49a823f757461cd5260757b088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd84a8f95166367063218ee03ffd5a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db31d2bbc9b044646fd026f239e7b62.png)
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8 . 为了预防某种病毒,学校对教室进行药熏消毒,室内每立方米空气中的含药量
(单位:毫克)随时间
(单位:h)的变化情况如右图所示,在药物释放的过程中,
与
成正比;药物释放完毕后,
与
的函数关系式为
(
为常数),根据图中提供的信息,写出从药物释放开始,
与
之间的函数关系式______ .据测定,当空气中每立方米的含药量降低到
毫克以下时,学生方可进教室学习,那么从药物释放开始,至少需要经过______ 小时后,学生方能回到教室.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d66a5fa78bb69f5f949b3f931385969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee2c5ade080f6c0f3480f9b8c5366fdb.png)
![](https://img.xkw.com/dksih/QBM/2024/1/17/3413162685145088/3413777178402816/STEM/d8eae67e6b054622be5de98d7f9b21db.png?resizew=182)
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9 . 若函数
(
,
)的图象恒过定点
,则点
的坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6763286b678cfd9819b27f593983e7a7.png)
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . 函数
的图象的相邻两支截直线
所得线段长为
,则
的值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbdb09cf73c320718b062859ad568f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277392cfe515c2de33cdbcfe5244c6c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9d61f4d0c18f5565f2641da52e7ed4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
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