27: If you decided to get rid of the square root, you should get
This is not a good idea.
Since the numerator is not an indeterminate difference, a better way seems to be to factor out leading terms and cancel. You should get
It is also possible to use l'Hospital's rule.
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