What is the inverse function of -LSB- math -RSB- f -LRB- x -RRB- = - x ^ 5 -2 x +2 -LSB- / math -RSB- ?
What is the inverse function of -LSB- math -RSB- x ^ 2-2x +1 -LSB- / math -RSB- if -LSB- math -RSB- x \ le 1 -LSB- / math -RSB- ?