l'Hôpital's rule applies to limits of form:
AOnly finite limits
BAlways
C0/0 or ∞/∞ indeterminate forms
DOnly at x = 0
Answer & Solution
Correct answer: C. 0/0 or ∞/∞ indeterminate forms
l'Hôpital: lim f(x)/g(x) = lim f'(x)/g'(x), valid for 0/0 or ∞/∞ forms (and only those). Apply repeatedly if needed; transform other indeterminate forms (0·∞, 1^∞, etc.) to 0/0 or ∞/∞ first.
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