MediumConic sections

Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §3.5 Parabolas, Ellipses, and Hyperbolas, #27 · Geometry · Conic sections

… is above the focus on the ellipse

This problem is about parabolas, are about ellipses, are about hyperbolas.

$(4, 9/5)$ is above the focus on the ellipse $x^{2} /25 + y^{2} /9 = 1$ . Find $d y / d x$ at that point and the equation of the tangent line.

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §3.5 Parabolas, Ellipses, and Hyperbolas, #27

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