已知函数
的图象关于原点对称.
(1)求实数
的值;
(2)用定义法判断函数
在
上的单调性;
(3)若存在
,使得不等式
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99d95abdffeefc8357bd7a111954df3d.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)用定义法判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
(3)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39c90920ad95b2da54d9e8dc2add019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d8da810ba4adf888af4ff1afd85dfce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2017-02-08 09:21:28
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相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知函数
(
且
).
(1)判断函数
的奇偶性;
(2)判断函数
在
上的单调性,并证明你的结论;
(3)当
时,若不等式
对于
恒成立,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a61f72c82bb51b1b1ff6eab282fb3a3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc6c300dc8ac5aec9aeb2f71c774ef62.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/824ac6606d83525ab2a43ea8749b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a4f8e4573e7384c4f4e608d823bca44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】对于函数
,如果对其定义域
中任意给定的实数,都有
,且
,就称
为“倒函数”.
(1)判断函数
是否为“倒函数”,并说明理由;
(2)若定义域为
的倒函数
的图象是一条连续不断的曲线,且
在
上单调递增,
.
①根据定义,研究
在
上的单调性;
②若
,函数
,求
在
上的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf26cb0612e3afd9fe70bbfa46975c51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc1872f5de84d30777fd10a725c04210.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ee416ff4d64140ae809935574942d1f.png)
(2)若定义域为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad2edd8edcb21bd41584daf9bb95a5c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5fd39a86263e8f2dbd9488234eb147e.png)
①根据定义,研究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1242160c88167344ad1d2c4195e05f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a26eb8b9ab522de3f406a51e993879b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ead3fdcb8fe8f5eb3dbe7d96cabc28b.png)
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解题方法
【推荐1】定义域为
的函数
满足:对任意的
有
,且当
时,有
,
.
(1)证明:
在R上恒成立;
(2)证明:
在
上是减函数;
(3)若
时,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de18c5ae806d998e6b7a035d2c2e1da4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b253bed990e08769d68d3d0c32eb69c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7fde71807463dbdfd8fce1655a5a9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd6536528d13d326f3c8f0b41e8266bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e37c94f22f621f6952e100cd6c2d3b0.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bca88b72ac8dc9c7c137af932de90bc7.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7fde71807463dbdfd8fce1655a5a9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7eb42e1ab57ceb445deb84ff70b166.png)
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572433815478272/1572433821515776/STEM/8289d9c06b6e4502bd1d343036172b58.png)
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【推荐2】定义在
上的函数
满足:①对任意
恒有
;②当
时,
,且
.
(1)判断
的奇偶性和单调性,并加以证明;
(2)求关于
的不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/862df674d5668eb2c8d67c889866463f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/100bf07f2dc69a9a6949fc2fea5b5b52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25bea6d14c16f7c06e4e028f36131360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71baf6217604517fd98fa97d0f55b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8ae637ab2db7442c4fafb163c992e38.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42be390a6f77fbfb9200b4fb52df1cea.png)
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解题方法
【推荐3】已知定义域为R的函数
是奇函数.
(1)求a,b的值.
(2)判断函数
的单调性,并用定义证明.
(3)当
时,
恒成立,求实数k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07b7c6d083f9218b5134f4c02f22b75.png)
(1)求a,b的值.
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb788ae88e457017bb81120b6a2e5ee.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a222bccf6cfbb8d2b959d27fd877991d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7a509bba768d4df73a9548f16cdf7f0.png)
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【推荐1】已知函数
为奇函数.
(1)求b的值.
(2)证明:函数
在区间
上单调递减.
(3)解关于x的不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf5aa8a8f2a96093dbd998427159143.png)
(1)求b的值.
(2)证明:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d6243e93c41978871cb23d8e66148d.png)
(3)解关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da151db2d5e4a659790d568a2ef74d1f.png)
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解题方法
【推荐2】已知函数
(a≠0)是奇函数,并且函数f(x)的图象经过点(1,3),
(1)求实数a,b的值;
(2)求函数f(x)的值域.
![](https://img.xkw.com/dksih/QBM/2016/2/25/1572499519602688/1572499525230592/STEM/8c7d879a343642eb9205d0b7b2f60682.png)
(1)求实数a,b的值;
(2)求函数f(x)的值域.
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解题方法
【推荐1】试分别解答下列两个小题:
(1)已知函数
,解不等式:
.
(2)若奇函数
是定义在
上的减函数,且
,求实数
的取值范围.
(1)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa0d4fb5720cbaa77543631ef8d5dd69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec9e67a8f2e43177e8c2f6c1dd18308.png)
(2)若奇函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e99bebf8db0d314aacb2cb1f09bf48c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3235929748d2654d4451dd0c186a611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4749985beebb82af49bf81daed263b91.png)
在区间
上的最大值为
,最小值为
,记![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913c49d395f0bfaa157f49f1b6ec7984.png)
(1)求实数
、
的值;
(2)若不等式
成立,求实数
的取值范围;
(3)对于任意满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99df8467af22e63c6fdc330820e1565f.png)
的自变量
,
,
,
,
,
,如果存在一个常数
,使得定义在区间
上的一个函数
,有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b77a08fe838d08eab3ab9979295d6d3.png)
恒成立,则称
为区间
上的有界变差函数,试判断
是否区间
上的有界变差函数,若是,求出
的最小值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4749985beebb82af49bf81daed263b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf8197e4f3fd18815045d29c357a863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a248e47163191168a1b363937eebd618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913c49d395f0bfaa157f49f1b6ec7984.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51ce5c1572f698c9568d486e644c410.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)对于任意满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99df8467af22e63c6fdc330820e1565f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dcf9acf6bc45ce8f1c3c1e2f29b3d0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e5531913e2f170465d8df01795cd51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c6cc1e8086c67bed8f50f2bbb19c79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2480f87a11c4cd450bc9454ea7276722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627565d32e529cafcd2744d006ec6de2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/355aff360b365e8ac73f8cf0943c8031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b77a08fe838d08eab3ab9979295d6d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b0e97cfdadbf04dd17a7b17b8e9ed55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/355aff360b365e8ac73f8cf0943c8031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627565d32e529cafcd2744d006ec6de2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6bfefa5b41faae17987876d570685d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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解题方法
【推荐3】已知函数
是定义在区间
上的奇函数.且
.
(1)用定义法判断函数
在区间
上的单调性;
(2)解不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2acee7aa2ac43b1bda9aadbe0ca4d12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3213a7a72b5e376ee25efd535398fb7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8929f3feff2237a510742059d249ba5.png)
(1)用定义法判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3213a7a72b5e376ee25efd535398fb7d.png)
(2)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b162d1a2b12e8b875b4eb0a9085723d8.png)
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