若函数y=f(x)与y=f-1(x)互为反函数,则有①反函数的定义域和值域分别是原来函数的值域和定义域; ②若奇函数有反函数,则反函数仍为奇函数; ③互为反函数的两个函数在各自的定义域内具 If the function y=f(x) and y=f-1(x) are inverse functions to each other, then the domain and value domain of the inverse function are respectively the value domain and the definition domain of the original function; 2 If the odd function is inverse For a function, the inverse function is still an odd function; 3 two functions that are mutually inverse functions have their own domain