Hey Guys Hope you are Fine , i need some Help with those numbers i got a lot of them

determine For f-1

1)f: x --> (radical) x ^ 2 x E R

2) f: x ---> x ^ 2 for x = and > 0

- X ^ 2 <0

3). f: x ---> sinx, x E R

4)f: x ---> x 2 / x-1, x # 1

5)f: x --> x ^ 2-4x 3 / x ^ 2-4x-5, s E] 5 + infinity[

6)Show that the function:

F: x --> x ^ 3-x, x E [1,3] admits a function reciproque

N.B: f-1 --->

Thanks in advance