2: The condition x ≠ 0 gives the domain

D( f ) = (−∞,0) ∪ (0,∞).

Now it is time to find limits at −∞, at 0 from the left and from the right, and at ∞.

Hint on limit at −∞
Hint on limit at 0 from the left
Hint on limit at 0 from the right
Hint on limit at ∞
Answer