已知函数
为奇函数.
(1)求m的值,并求
的定义域;
(2)判断函数
的单调性,不需要证明;
(3)若对于任意
,是否存在实数
,使得不等式
恒成立.若存在,求出实数
的取值范围;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65fc3f3db190915606ce036ffede6c6.png)
(1)求m的值,并求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)若对于任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/757a9bddfeae61f4779a874331043889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b117a660412ebd21d96d9c209de32284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
更新时间:2016-12-04 07:38:55
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解答题-问答题
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【推荐1】已知命题p:函数
的定义域为R;命题q:函数
在
上单调递增.
(1)如果p是真命题,求实数a的取值范围;
(2)如果
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为假命题,求实数a的取值范围.
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(1)如果p是真命题,求实数a的取值范围;
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
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【推荐2】已知函数
的定义域为集合A,集合
.
(1)若
,求
;
(2)若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf64c68a647631e03fab80e05be5d54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ea1be9aa0cc83a4b3344c516b2b4d3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc881d5a6f5c8fad4acccc60e89ff445.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b05d2be27e8f53e4de3071846dffb41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐3】已知函数
的定义域为集合
,函数
的值域为集合
.
(1)求
;
(2)若集合
,且
,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0303e3c14ee782330d2544f92dc9a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9214c18074bbd53581cf030645d2f711.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
(2)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/867e3cbd955ebe6f11f2da714ece150a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca0ce54011a1d02f0eaf81b07bb85c3.png)
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解题方法
【推荐1】已知函数
,
为非零常数.
(1)当
时,求
的值;
(2)当
时,试判断函数
的单调性,并说明理由;
(3)当
时,不等式
对
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91339781472f998d83f7296505fa5313.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19bce4c604450307f40dcbd6a9ca6c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c224aae5441d24e8724cba696bb50c5b.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7992d077652ab674493d0836520fc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec8a14649950eb1c74a1a1af244fbf8f.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47c88c150f313c47f34668ea41ba3f0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905b00672b8ddc8abb547376fd9b0ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05f1a3feca6218955446108ebad0a524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
【推荐2】已知函数
(
,且
)
(1)求
的值及函数
的定义域;
(2)若函数
在
上的最大值与最小值之差为3,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25746a9eb7e166ba3dc61272a9ad8f81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d55ef0d1b7ea88d92fd6e1ecebb5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c8dc79d325623f2a94acfc6d5811fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-问答题
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解题方法
【推荐1】已知函数
是定义在
上的奇函数.
(1)求
的值,判断函数
的单调性并用定义证明;
(2)若
,解关于
的不等式:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/888b7c6aace5412683691abf70be154d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baedc4d7e690ab3f7d80d30ba0a9efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e91a19cc7a5d48d198a52715b872a98.png)
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解题方法
【推荐2】已知函数
是定义在
上的奇函数,且
.
(1)求实数m,n的值;
(2)用定义证明
在
上是增函数;
(3)解关于t的不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e63441e28f976e7e159e45271c32398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/455ba3d3e46977fcbe5b71f8bb9df4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8670a6b1e4297883b7cb36befde6c14.png)
(1)求实数m,n的值;
(2)用定义证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/455ba3d3e46977fcbe5b71f8bb9df4be.png)
(3)解关于t的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c2fa6e408f6986258dc8da51127d6c6.png)
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解题方法
【推荐1】如图为某区域部分交通线路图,其中直线
,直线l与
,
,
都垂直,垂足分别是点A、点B和点C(高速线右侧边缘),直线
与
,
与
的距离分别为1千米、2千米,点M和点N分别在直线
和
上,且满足
,记
.
![](https://img.xkw.com/dksih/QBM/2022/3/15/2936934090989568/2939780677812224/STEM/2a912b599ca84159868afa01078b8d10.png?resizew=189)
(1)若
,求
的长度;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b64254ccf2bf88337f4e88055a0cc4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fce9427c9b17e4d3cda0c3ff3e2e14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fce9427c9b17e4d3cda0c3ff3e2e14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fce9427c9b17e4d3cda0c3ff3e2e14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12777a96242feadf7964af7823b7450c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b5994a657fa9205d55720d0f0b4d9e6.png)
![](https://img.xkw.com/dksih/QBM/2022/3/15/2936934090989568/2939780677812224/STEM/2a912b599ca84159868afa01078b8d10.png?resizew=189)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f8783429be686df75afcd56e847dfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd90f1d0c711f4bbda393065d8f894e.png)
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【推荐2】已知
.
(1)试用五点作图法画出函数
在
上的简图;
(2)定义在
上的减函数
,若
对
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c342275d97680f3650556645683e0ed.png)
(1)试用五点作图法画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b604c6522119e77c1cb16b91532a2c1.png)
(2)定义在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6223fc449b837ce40aed0f86fad7f1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eed32cb9c217533abe855b0c9144cbec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐3】某中学为美化校园将一个半圆形边角地改造为花园.如图所示,
为圆心,半径为
千米,点
、
、
都在半圆弧上,设
,
,其中
.
、
、
三部分组成,求当
取何值时,参观的线路最长;
(2)若在花园内的扇形
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内种满杜鹃花,求当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9cded3be0e3c88a3f00550eacd4f313.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/297f91f8de05cd18a6053b675836d59f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f63ceea8e3338aea834d5f8187f80f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c023f4b501684abd869b36d6e6c7f21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)若在花园内的扇形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7f11db05569a88a3da8d4b635d0ff94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73fcc14ccfc36cf709bf5a4aa32dfa00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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