解题方法
1 . 若函数
在区间
内有两个不同的零点,则
的取值范围为____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d52a67018daa5cd6f223ac96baf87c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
2 . 如图所示,将一矩形花坛
扩建成一个更大的矩形花坛
,要求
点在
上,
点在
上,且对角线
过
点,已知
米,
米.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/ca8ce456-0582-4ea8-90bf-d8ec74a3a8f6.png?resizew=200)
(1)要使矩形
的面积大于64平方米,则
的长应在什么范围内?
(2)当
的长为多少时,矩形花坛
的面积最小?并求出最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92e6f84f2a5721303019f158d860cd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/ca8ce456-0582-4ea8-90bf-d8ec74a3a8f6.png?resizew=200)
(1)要使矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92e6f84f2a5721303019f158d860cd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92e6f84f2a5721303019f158d860cd5b.png)
您最近一年使用:0次
3 . 若函数
在
上为减函数,则
的取值范围为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22fe6a76d10e2c765fa4fde778170754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da4f20890e1be975ec29f98d5a3e9310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
4 . 给出下列三个命题:
命题1:存在奇函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
和偶函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
,使得函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439e00f0abab91f7a1796ab96dcaeacf.png)
是偶函数;
命题2:存在函数
、
及区间
,使得
、
在
上均是增函数, 但
在
上是减函数;
命题3:存在函数
、
(定义域均为
),使得
、
在![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11abb76da45ffa52b47c3a6b9a03ac7e.png)
处均取到最大值,但
在
处取到最小值.
那么真命题的个数是 .
命题1:存在奇函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c973a77ff9918f4dbf043a16c3dc1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc7344340f875dc5839365dad488f68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439e00f0abab91f7a1796ab96dcaeacf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82c1e4dba001d6906eaf92363e2dceac.png)
命题2:存在函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439e00f0abab91f7a1796ab96dcaeacf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
命题3:存在函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11abb76da45ffa52b47c3a6b9a03ac7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02dc112e2b458c07ca945297cb803950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439e00f0abab91f7a1796ab96dcaeacf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11abb76da45ffa52b47c3a6b9a03ac7e.png)
那么真命题的个数是 .
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2018-04-26更新
|
318次组卷
|
4卷引用:上海市松江、闵行区2018届高三下学期质量监控(二模)数学试题
名校
5 . 对于任意的实数
,记
为
中的最小值.设函数
,
,函数
,若
在
恰有一个零点,则实数
的取值范围是 ____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a14b79409a9c5e1a0df92bec8d040cd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e9211362163fd7156a4f568ac301d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e67fbb13f7d4b8abb69b93a398fb66ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b75783fbafadba6e9c44c246c91d9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2014·山东日照·一模
名校
6 . 设
是定义在
上的偶函数,且
,当
时
,若在区间
内,函数
,
恰有一个零点,则实数
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8127a4b0b81fdeefcfb9bdc2c7dd05d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/626d8e8bba19df463a1b6f4e4d2377cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe685c4cae316a0fec8f1ef7d67f9c6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6421ffe4655a7bc8b6e46ee93a96b0c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47157f948dda73b7bd58d1a56b5a14c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b93abe2a497b7ef3cb8c1b9de8492e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-03更新
|
2838次组卷
|
3卷引用:2014届山东省日照市高三5月统一质量检测考试理科数学试卷
(已下线)2014届山东省日照市高三5月统一质量检测考试理科数学试卷【全国百强校】河北省唐山一中2018届高三下学期强化提升考试(一)数学(文)试题【全国百强校】宁夏石嘴山市第三中学2019届高三上学期期末考试数学(文)试题
7 . 已知存在常数
,那么函数
在
上是减函数,在
上是增函数,再由函数的奇偶性可知在
上是增函数,在
上是减函数.
(1)判断函数
的单调性,并证明:
(2)将前述的函数
和
推广为更为一般形式的函数
,使
和
都是
的特例,研究
的单调性(只须归纳出结论,不必推理证明)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1982786864f37e6f954e8d70f9970620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311f24add812e85cff437a699caa202e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c049415b40b1e5d3ddbd8c6b945c987c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf2390c13c992d18d88c1e50254ce477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29caaa3309d75b3b6927301b3d096fda.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee9b6dcfe4ce020479c0b7b1a167a7c.png)
(2)将前述的函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
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名校
8 . 下列命题正确的是__________
(1)若
,则
;
(2)若
,
,则
是
的必要非充分条件;
(3)函数
的值域是
;
(4)若奇函数
满足
,则函数图象关于直线
对称.
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf3935ea958cb302fcd9d89a9182b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c8f3c6733218e53fcf00abf3a2b990e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/199958257b5d2bbefdc406a512bdab86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1491af05b0cd698d1055958fc8a5104.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23af61cd402b3789af2401bde9cbefe.png)
(3)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d367bc229ad62fe1c3c7213705c2f02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad3cc66a47b09bd04e29c82b55faf22.png)
(4)若奇函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb00fdf681e3ea2f61abbe7b33a639a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
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9 . 定义在
上的函数
,如果对于任意给定的等比数列
,
仍是等比数列,则称
为“等比函数”.现有定义在
上的如下函数:①
;②
;③
;④
,则其中是“等比函数”的
的序号为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8bd00a1b1c012681aab8513b755cbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c704d7054cbdc9d975d4326091cc5251.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8bd00a1b1c012681aab8513b755cbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee6881a170f6ef9ed5c133b95c2f448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/109f44a525a111396b578fcf6d766e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/318a16f1950d06e5500c76d8f81a507f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45faa734fb9e0bd997d290124c3d88b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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2016-12-02更新
|
1763次组卷
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3卷引用:2014届安徽省望江四中高三上学期第一次月考文科数学试卷
(已下线)2014届安徽省望江四中高三上学期第一次月考文科数学试卷【全国百强校】陕西省西安市长安区第一中学2017-2018学年高二下学期期末考试数学(文)试题上海市2018-2019学年高三上学期12月仿真数学试题
名校
10 . 已知
都是定义在
上的函数,
,若
,且
(
且
)及
,则
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8fd1e808e015f4cb43d2e3a0529ac6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e04db31d54a054dd712e2995751b9c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22bad2ef2c39ab609e0505eac1a99522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7701de6dd5931b70515002344352da9.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/865fdf7bdb07583af57f1b55850e48cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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