计算下列各式的值
(1)
;
(2)
;
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999ae0728998dd85ce29c34bbca660a5.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60f4d6f3543bdd1d60b1f9ab4e719479.png)
22-23高一下·湖南株洲·开学考试 查看更多[4]
湖南省株洲市炎陵县2022-2023学年高一下学期开学考试数学试题(已下线)4.3 对数(重难点突破)-【冲刺满分】(已下线)专题04 指数与对数-中考点大串讲(苏教版2019必修第一册)(已下线)第02讲 4.3对数+4.4对数函数-【练透核心考点】
更新时间:2023-09-19 00:02:57
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解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】已知函数
,
,
,且
.
(1)若
,求实数
的值;
(2)若
或
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304fc48e3d9c86c02e0e594b8ab8a388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af08e635bc0d077d1d0ad1c303990d7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4812229127cac9216fcb75e8e9320207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea260036d99e5171a7b762dc990e1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3de4357d4c66f6348116be27e19fc291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
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适中
(0.65)
名校
【推荐2】如果函数
对于定义域内的任意两个数
都满足:
,那么称函数
为下凸函数;而总有
时,那么称函数
为上凸函数.根据以上定义,判断指数函数
(
且
)在
上是否为下凸函数,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d3dbbb678b0b13c53ae5afa3f32d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063223b5d1fc1b45ad67c449b330a064.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d76ee3b131ecd6aa1aacf7fb7b3eb15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】已知函数
,且
.
(1)求函数
的表达式;
(2)判断函数
的奇偶性,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12be5e0c1681b2f57e60a3fb0113b80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448a2cb778f800d68a1efe5ac2c6539c.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ead69eb6b76e4edd07b176c0032d2ef.png)
您最近一年使用:0次