Define a function ?∶ â„→℠by
?(?)={?+1,[?] ?? ??? ?−1,[?]?? ????
where [x] is the integer part function. Is ? injective?
- (b) Verify if the following function isbijective. If it is bijective, determine its inverse.
?∶ â„\{5/4}→â„\{9/4} , ?(?)=(9∙?)/(4∙?−5)
