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函数的图象和性质是对数函数的重点.这部分的难点是指数函数与对数函数的关系,运用对数函数的性质解决有关问题,尤其是以对数函数的底为字母时
The image’s properties and properties are the focus of the logarithmic function. The difficulty in this part is the relationship between the exponential function and the logarithmic function. The nature of the logarithmic function is used to solve the problem, especially when the base of the logarithmic function is the letter.