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1、精品教学教案高一数学必修1 编号：SX-01-15-012 2.2.2 对数函数及其性质导学案编写:冯韵审核:付阿丽编写时间:2015 年 10 月 12 日姓名:班级:组别:组名:【学习目标】1知道对数函数的概念.2通过比较、对照的方法，结合图象类比指数函数，探索研究对数函数的性质.3知道指数函数与对数函数互为反函数【重点难点】重点:对数函数的图象和性质.难点:借助对数函数的图象探索并归纳对数函数的性质.【知识链接】1研究指数函数图像和性质的方法.2对数的运算.【学习过程】阅读课本70 页到 71 页的内容，尝试回答以下问题：知识点 1:对数函数的定义问题 1请回答对数函数的定义，并注明定义
2、域.问题 2根据对数函数的定义，尝试判断下列哪些是对数函数？)1(log2xyxy4log23log31xyxy3logxy21logxy21log1知识点 2:对数函数的图像与性质问题 1你能类比前面讨论指数函数性质的思路，提出研究对数函数性质的内容和方法吗？问题 2在同一坐标系中画出函数xy2log和xy21log的图象.问题 3观察上述两个函数图像，它们的定义域、值域、单调性分别有何特征？学习资料总结-名师归纳欢迎下载-欢迎下载 名师归纳-第 1 页，共 4 页 -精品教学教案问题 4根据问题3，由特殊到一般，你能归纳出对数函数)0,0(logaaxya且的哪些性质？10a1a图像性质定
3、义域值域过定点过定点，即1x时，0y函数值的变化当10 x时，当1x时，当1x时，当10 x时，当1x时，当1x时，单调性是(,0)上的是(,0)上的对称性函数xyalog和xya1log的图象关于对称.阅读课本73 页的内容，尝试回答以下问题：知识点 3:对数比较大小问题 1试比较下列各组数中两个值的大小.（1）5.3log2,8log2（2）5.4log,4log2121（3）1.5loga,7.5loga（4）8log7与7log8问题 2请归纳比较对数大小的方法.学习资料总结-名师归纳欢迎下载-欢迎下载 名师归纳-第 2 页，共 4 页 -文档编码:CO10I10X4P7K4 HR10
4、S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P
5、7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO
6、10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O
7、6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7
8、L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6
9、W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4
10、HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6精品教学教案如果两对数
11、的底数相同，则由 .如果两对数的底数和真数均不相同，则 .知识点 4:指数函数与对数函数互为反函数问题 1如何由xy2求出x？问题 2函数xy2与函数xy2log是否互为反函数？为什么？【基础达标】A1已知函数xayalog)1(2是对数函数，求a的值.B2、求下列函数的定义域)54(log22xxy)34(log5.0 x)32lg(422xxxC3函数xyalog恒过一定点，这个点的坐标是 .函数)2(logxya恒过一定点，这个点的坐标是 .函数3)2(logxya恒过一定点，这个点的坐标是 .D4已知下列不等式，比较正数m、n的大小.（1）nm33loglog（2）nm3.03.0lo
12、glog（3）nmaaloglog学习资料总结-名师归纳欢迎下载-欢迎下载 名师归纳-第 3 页，共 4 页 -文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S
13、6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7
14、K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO1
15、0I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6
16、文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L
17、10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W
18、2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 H
19、R10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6精品教学教案【小结】1对数函数的概念：2对数函数的图象与性质：3对数比较大小的方法：【当堂检测】A1已知对数函数)(xfy的图像经过点（9，2），试求)(xf的解析式.【课后反思】学习资料总结-名师归纳欢迎下载-欢迎下载 名师归纳-第 4 页，共 4 页 -文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P
20、7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO
21、10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O
22、6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7
23、L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6
24、W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4 HR10S6M6W2J9 ZG7L10O6E1O6文档编码:CO10I10X4P7K4
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