Question

y=2x-1 inverse function. show steps PLEASE :D

Answer 1

y+1 = 2x
x = (y+1)/2

then swap x<->y:

y = (x+1)/2 is inverse function

Answer 2

is that showing all the work? @triangleguru

Answer 3

yes, inverse function means to express x as function of y and then swap x and y in formula.

Many functions have conditions on x,y where function and its inverse function exists. Some functions have inverse only on limited intervals (like periodic functions).

In this case y = (x+1)/2 exists for any x.