Find the range of y = 1 / (x-1 of 3)

Find the range of y = 1 / (x-1 of 3)

If the title is:
y = 1/(3^x -1)
You can:
Because the domain of y = 1 / (3 ^ X - 1) is x ≠ 0
Because the range of y = 3 ^ x is Y > 0 and Y ≠ 1
So the range of y = 3 ^ X - 1 is Y > - 1 and Y ≠ 0
So the range of y = 1 / (3 ^ X - 1) is (- ∞, - 1) ∪ (- 1, + ∞) or write y ≠ - 1