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L'Hôpital's rule - Wikipedia

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L'Hôpital's rule (/ˌloʊpiːˈtɑːl/, loh-pee-TAHL) or L'Hospital's rule, also known as Bernoulli's rule, is a mathematical theorem that allows evaluating limits of indeterminate forms using derivatives. Application (or repeated application) of the rule often converts an indeterminate form to an expression that can be easily evaluated by substitution. The rule is named after the 17th-century French mathematician Guillaume De l'Hôpital. Although the rule is often attributed to De l'Hôpital, the theorem was first introduced to him in 1694 by the Swiss mathematician Johann Bernoulli. De L'Hôpital's rule states that for functions f and g which are differentiable on an open interval I except possibly at a point c contained in I, if lim 𝑥 → 𝑐 𝑓 ( 𝑥 ) = lim 𝑥 → 𝑐 𝑔 ( 𝑥 ) = 0 or lim 𝑥 → 𝑐 𝑔 ( 𝑥 ) = ± ∞ , and 𝑔 ′ ( 𝑥 ) ≠ 0 for all x in I with x ≠ c, and lim 𝑥 → 𝑐 𝑓 ′ ( 𝑥 ) 𝑔 ′ ( 𝑥 ) exists, then The differentiation of the numerator and denominator often simplifies the qu

L'Hôpital's rule - Wikipedia Jump to content From Wikipedia, the free encyclopedia Mathematical rule for evaluating limits Part of a series of articles about Calculus ∫ a b f ′ ( t ) d t = f ( b ) − f ( a ) {\displaystyle \int _{a}^{b}f'(t)\,dt=f(b)-f(a)} Fundamental theorem Limits Continuity Rolle's theorem Mean value theorem Inverse function theorem Differential Definitions Derivative ( generalizations ) Differential infinitesimal of a function total Concepts Differentiation notation Second derivative Implicit differentiation Logarithmic differentiation Related rates Taylor's theorem Rules a

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