7: Conditions x/(x − 1) > 0, x − 1 ≠ 0 give the domain
D( f ) = (−∞,0) ∪ (1,∞).
Now it is time to find limits at −∞, at 0 from the left, at 1 from the right, and at ∞.
Hint on limit at −∞ Hint on limit at 0 from the left Hint on limit at 1 from the right Hint on limit at ∞ Answer