已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5583da92653ac3c90cc43c58c8bd7a24.png)
(1)判断函数
的奇偶性,并证明.
(2)若
,根据函数单调性的定义证明函数
在区间
的单调性.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5583da92653ac3c90cc43c58c8bd7a24.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68eafd45c1ec4b414d3553dabd8c2848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e83c699e84427dbcf5a98c2a4d65c587.png)
更新时间:2023-12-15 17:18:53
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适中
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真题
【推荐1】已知函数
,其中
为实数.
(1)根据
的不同取值,判断函数
的奇偶性,并说明理由;
(2)若
,判断函数
在
上的单调性,并说明理由.
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572141761069056/1572141766672384/STEM/00562f699134463ebac8f1321e86dc79.png?resizew=100)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572141761069056/1572141766672384/STEM/76d6314b8dcf4bdd8764e6422a79ed1e.png?resizew=13)
(1)根据
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572141761069056/1572141766672384/STEM/76d6314b8dcf4bdd8764e6422a79ed1e.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572141761069056/1572141766672384/STEM/50279cca45c34b4cb71f591531de865e.png?resizew=36)
(2)若
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572141761069056/1572141766672384/STEM/8f67615f305b452d98f6e3944f571eb5.png?resizew=56)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572141761069056/1572141766672384/STEM/50279cca45c34b4cb71f591531de865e.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2015/6/24/1572141761069056/1572141766672384/STEM/93bd7798a64f423489010258397346e3.png?resizew=31)
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适中
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【推荐2】已知函数
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf49a82d98518165f0830dc3b4551334.png)
(1)根据定义证明:函数在
上是增函数;
(2)根据定义证明:函数是奇函数.
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解题方法
【推荐1】设定义在
上的函数
对任意
均满足:
,且
,当
时,
.
(1)判断并证明
的奇偶性;
(2)判断并证明
在
上的单调性;
(3)若
,解不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64541d7f445079207b6f671adc7d662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50b7bfbea6239a83d09ba1d30eaf5135.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104375baf5cef5eb92cfc7cf13b80193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
(1)判断并证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)判断并证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4ed4485745f1d259a3953c242b9cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f353f0ea0747e8e9f2b0784db81231.png)
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适中
(0.65)
名校
【推荐2】已知函数
.
(1)若函数
, 判断
的奇偶性并加以证明;
(2)当
时, 先用定义法证明函数
在
上单调递增;
(3)若对任意
,都有
恒成立,求实数a的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d2149738bc31036c4d102b4f43ceb3.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d61f235c3a4f5c62f85b5eaccdd38d0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03db4ea1dcb63b22cf4e917df5db581e.png)
(3)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c867b551ca4681b993da05c4e93a1bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d594a2f04a0a87b81c20088b95e417c2.png)
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