Discuss the below:
(a) Define the function f: R →R by f(x) = x2 - 6. Briefly explain why f is not a 1-1 (one-to-one) function.
(b) Is the function g: Z→ Z defined by g(n) = n/2 a one to one function? Explain.
(c) Briefly explain what f-1 means, and find f-1 for part (a)