which of the following is an example of rational function?
a. 5x/x-1 = 3
b. f(x) = 5x-2/x-1
c. 2/-1 >2
d. 5x/x-3 < -4

find f^1 (x) given that f(x) = 5x-8 is one-to-one?
a. f^-1(x) = x+5/5
b. f^-1(x) = x+8/5
c. f^-1(x) = 5x/8
d. f^-1(x) = 8x/5​