27: Conditions x − 3 ≠ 0, x2 + 7 ≥ 0 give the domain
D( f ) = (−∞,3) ∪ (3,∞).
Now it is time to find limits at −∞, at 3 from the left and from the right, and at ∞.
Hint on limit at −∞ Hint on limit at 3 from the left Hint on limit at 3 from the right Hint on limit at ∞ Answer