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4.10 Using L'Hôpital's Rule for Indeterminate Forms

AP Calculus AB

L'Hôpital's Rule

Indeterminate forms

The rule

Step-by-step procedure

Example 1: basic $\dfrac{0}{0}$

Example 2: $\dfrac{0}{0}$ requiring two applications

Example 3: $\dfrac{\infty}{\infty}$

Example 4: exponential vs polynomial

Example 5: logarithmic growth

Growth rate hierarchy

Common pitfalls

Converting other indeterminate forms

Example 6: $0 \cdot \infty$ form

Important limits to know

AP exam tips

Vocabulary