Solution:
Here,
f = {(2,\(\frac12\)),(3,\(\frac13\)),(4,\(\frac14\))}
Range = { \(\frac12\), \(\frac13\), \(\frac14\)}
Inverse function (f-1) = {(\(\frac12\),2),(\(\frac13\),3),(\(\frac14\),4)} is the required answer
Note: Inverse of the function is x and y reversed