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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §2.3 The Slope and the Tangent Line, #17 · Calculus · Derivatives

For …, find all points where the tangent is horizontal

For $y = x^{3} + 4 x^{2} - 3 x + 1$ , find all points where the tangent is horizontal.

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §2.3 The Slope and the Tangent Line, #17

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