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Precalculus · F-IF

Introduction to Limits — Evaluating Limits Numerically and Algebraically

lim_{x→c} f(x) = L means f(x) gets arbitrarily close to L as x approaches c. For polynomials, substitute directly. For rational functions, factor and cancel first.

PrecalculusCommon Core HSF-IF.C.7F-IFVerified correct ✓

Worked examples

Find lim x→-1 [x - 3].
Answer: -4
Find lim x→-1 [4*x**2 - 3*x + 4].
Answer: 11

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Key Features of Rational FunctionsEnd Behavior and Asymptotes of Rational Functions

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