题目[题目]对数函数的图象过点M(16,4),则此-|||-对数函数的解析式为-|||-A. =(log )_(2)x-|||-B. =(log )_(dfrac {1)(4)}x-|||-C. =(log )_(dfrac {1)(2)}x-|||-D. =(log )_(4)x题目解答答案