反函数教学中应注意的几个问题３１２０５０浙江绍兴平水中学单文海１只有从定义城到值域上的一一映射确定的函数，才有反函数．特别：定义域上的单调函数必有反函数．例１下列函数是否存在反函数，试说明理由．ｆ（）不是从定义城到值域上的一一映射确定的函数，它没有反... Some Problems Should Be Paid Attention to in Inverse Function Teaching 312050 ShanXiao, ShanXing, ShanXi, ShanXue, ShanXi 1 Only the function defined by the one-to-one map from the definition of the city to the value domain can have an inverse function. Special: The monotonic function on the domain must have an inverse function. Example 1 Whether there is an inverse function for the following function, try explaining the reason. f() is not a function determined from a one-to-one mapping of the defined city to the value domain, it does not have the inverse...