已知函数
.
(1)判断并证明
的奇偶性;
(2)用单调性的定义证明函数
在其定义域上是增函数;
(3)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d323991e67f0abe842ef61d339c46ff5.png)
(1)判断并证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)用单调性的定义证明函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a584622a665d9c649ef229d30c0c19f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2019-11-30 12:49:25
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【推荐1】(1)已知
是定义在
上的奇函数,求实数
、
的值;
(2)已知
是定义在
上的函数,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db3ebe781970bdaebf9a96800ec546f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db3ebe781970bdaebf9a96800ec546f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐2】已知函数
为奇函数,
.
(1)求
的值;
(2)判断函数
的单调性;
(3)若
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07d28fd96a55f935ee1528bb1047f6fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1ee72f40cad88d270c1b656461ca15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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【推荐3】已知奇函数
的定义域为
,且当
时,
.
(1)求
的解析式;
(2)已知
,存在
,
使得
,试判断
,
的大小关系并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/862df674d5668eb2c8d67c889866463f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b49dd7a6e8af3741f9280db696f5a71.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf581b5983415a8c25cd20f3bde6f7b9.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/f23b2604e5f8be78fbe6cafcb9b7f2f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
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【推荐1】已知
,函数
的图象经过点
.
(1)求a的值;
(2)判断
的奇偶性并证明;
(3)判断
在区间
上的单调性并证明.(参考公式:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/234b285a3ca8566e14c8f665f4f0c1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/668d61a88b296ebd55a3b0bbc277539a.png)
(1)求a的值;
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f35c30f027c8d39805c829139fa915d.png)
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【推荐2】已知定义域为R的函数
是奇函数,
(1)求
的值.
(2)判断函数
在
上的单调性并加以证明;
(3)若对于任意
不等式
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b318bcec6ae5323cfec73ff45ed84d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
(3)若对于任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ef3479dfeb5d67634e2b962ab448f26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc3806cb29aaf89a3951b91ef948d0bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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【推荐3】已知函数
对任意
,总有
,且当
时,
,
,
(Ⅰ)求证:函数
是奇函数;
(Ⅱ)利用函数的单调性定义证明,
在
上的单调递减;
(Ⅲ)若不等式
对于任意的
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcbca3478eae63853d2aab5332e2e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/941b4ceaf8c97a676d9ad3320cb940d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b666663ce3537a634a3b427b418eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf72bb8497a21b03e0ebfc1faec3079d.png)
(Ⅰ)求证:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(Ⅱ)利用函数的单调性定义证明,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
(Ⅲ)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13a6fbeec8019554bfe254504ed41ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00231660ef092b9383a4d4196c8ef850.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐1】已知函数
,
.
(1)判断函数
的奇偶性,并说明理由;
(2)若存在两不相等的实数a,b,使
,且
,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31105a71fd7a858f4dabc8f162070cd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69dfef4befae494caff8d49f2fdaa121.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)若存在两不相等的实数a,b,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54f5a77a781e00e3c59bcde9868ea22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d4bf250956556466516f91fbac79959.png)
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【推荐2】已知函数
.
(1)判断函数
的奇偶性并证明;
(2)判断函数
在区间
上的单调性,并用单调性的定义证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fda03a34b0f2967d396ea30a7697245.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25bacb5a64d4ae725bfcce99f0496dfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
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【推荐3】已知函数
,其中
,且
.
(1)判断并证明函数
的奇偶性;
(2)判断
的单调性(不需证明);
(3)求使
成立的
的取值集合.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1db25c4ce8f8d04aeeb6bb8adca9cb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da4d4ce8d7053908cb4c47f555ef3f1.png)
(1)判断并证明函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(3)求使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db77cc9b118410e4debcf1521d041e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐1】已知函数
.
(1)若
,求函数
的零点;
(2)若
,写出函数
在
上的奇偶性,不必说明理由;
(3)若
,判断函数
在
上的单调性,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/613a6aceebff6e0ca0aafdddcbe48a23.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c9ca7c6bbcee8c6389b976fef7e45b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea48ab54d69d60e7a6dcf200aa3ae02c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba296251f96be272abf30c1c0e1a8df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
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