第二章第二章 基本初等函数（基本初等函数（）1/382/383/384/385/386/387/388/389/3810/3811/3812/3813/3814/3815/3816/3817/3818/3819/3820/3821/3822/3823/3824/3825/3826/3827/3828/3829/3830/3831/3832/3833/3834/3835/3836/3837/3838/38