Imate jednadžbu # Y = x ^ 2-4 * + 3 # razmjena # Y # s #x# i obrnuto # X = y ^ 2-4y + 3 # Riješite za # Y # # Y ^ 2-4y = x-3 # # (Y-2), (y-2) = x -2-3 # # (Y-2) ^ = 2-2 x-3 # # (Y-2) ^ 2-x-1 # # Y-2 = + - sqrt (x-1) # # Y = 2 + -sqrt (x-1) # Sada zamijeni # Y # s # F ^ 1 (x) * # F ^ 1 (x) = 2 + -sqrt (x-1) #
