18: Conditions
    • (2x − 4)/(x + 1) > 0,
    • x + 1 ≠ 0,
    • ln[(x + 1)/(x + 1)] ≠ 0
give the domain

D( f ) = (−∞,−1) ∪ (2,5) ∪ (5,∞).

Now it is time to find limits at −∞, at −1 from the left, at 2 from the right, at 5 from the left and from the right, and at ∞.

Hint on limit at −∞
Hint on limit at −1 from the left
Hint on limit at 2 from the right
Hint on limit at 5 from the left
Hint on limit at 5 from the right
Hint on limit at ∞
Answer