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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §2.7 Continuous Functions, #45 · Calculus · Continuity

A function has a ______ at … if and only if …

A function has a ______ at $x = 0$ if and only if $(f (x) - f (0)) / x$ is ______ at $x = 0$ .

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §2.7 Continuous Functions, #45

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