已知函数
满足
(
为常数),且
=3.
(1)求实数
的值,并求出函数
的解析式;
(2)当
时,讨论函数
的单调性,并用定义证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b898a8a75c5ed646601bc582b6a4cb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74156327e5659301f391814605688899.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
更新时间:2019-12-16 14:30:16
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】设函数
是定义在R上的函数,对任意实数
,有
.
(1)求函数
的解析式;
(2)若函数在
在
上的最小值为-2,求
的值.
![](https://img.xkw.com/dksih/QBM/2015/11/19/1572298157834240/1572298163134464/STEM/40d90d3065ff4594ab1e10f7e001af5a.png)
![](https://img.xkw.com/dksih/QBM/2015/11/19/1572298157834240/1572298163134464/STEM/c4e3bd3216e04389b196233b19b537a0.png)
![](https://img.xkw.com/dksih/QBM/2015/11/19/1572298157834240/1572298163134464/STEM/c6859cbf5b2d482ab8a0f0271d94e704.png)
(1)求函数
![](https://img.xkw.com/dksih/QBM/2015/11/19/1572298157834240/1572298163134464/STEM/40d90d3065ff4594ab1e10f7e001af5a.png)
(2)若函数在
![](https://img.xkw.com/dksih/QBM/2015/11/19/1572298157834240/1572298163134464/STEM/710e0d8f971843f99a6c05ea5eae2bd9.png)
![](https://img.xkw.com/dksih/QBM/2015/11/19/1572298157834240/1572298163134464/STEM/e0208e1d8510432996e79f3bb6fb291d.png)
![](https://img.xkw.com/dksih/QBM/2015/11/19/1572298157834240/1572298163134464/STEM/f352e1767f86402f8a699b82f5c440ef.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】设
是区间
上的函数,且同时满足:①对任意
,恒有
;②对于任意
,恒有
+
.
试证明:(1)对任意
都有
;
(2)对任意
都有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1242ec96ac54e2fd418988d5190a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c7b69e93488fcd2a195cb9793e94fc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f01b424cd6859d55f2e1ba4c80d2c8bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7526b05996ab76067539caac466a8344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1308729f58d63d4b9a631297cbdf141.png)
试证明:(1)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c7b69e93488fcd2a195cb9793e94fc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7559fb6b4b5a4e8fc721675ab1775a2.png)
(2)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f01b424cd6859d55f2e1ba4c80d2c8bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2037b0bad7c7a312bac1ac0653d9a491.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】已知函数
为奇函数.
(1)求实数
的值,判断并证明
在
上的单调性;
(2)若关于
的不等式
的解集非空,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4d1153d80c6f811310cbc355049cfe.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf0d7124fc0f913ff568290cf179077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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解答题-证明题
|
适中
(0.65)
名校
【推荐2】(1)已知函数
,试判断函数
的单调性,并说明理由;
(2)已知函数
.
(i)判断
的奇偶性,并说明理由;
(ii)求证:对于任意的x ,y∈R,且x≠±1 ,y≠±1,xy≠−1都有
①.
(3)由⑵可知满足①式的函数是存在的,如
.问:满足①的函数是否存在无穷多个?说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12980834589006b0f6096620a2a66306.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c679d901bbf3c1ab4bb460b14c14a92e.png)
(i)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(ii)求证:对于任意的x ,y∈R,且x≠±1 ,y≠±1,xy≠−1都有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f8de2d956667ac46558461c40c0c528.png)
(3)由⑵可知满足①式的函数是存在的,如
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c679d901bbf3c1ab4bb460b14c14a92e.png)
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