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Tangent Line Approximation, Given this ellipse 5x² - 6xy +5y^2 = 16 differentiate implicitly to get...

Tangent Line Approximation, Given this ellipse 5x² - 6xy +5y^2 = 16 differentiate implicitly to get the slope at (1, -1) find the tangent line and use it to approximate y on the ellipse for x = 1.1. State whether this is an over or under estimate and why (concave up or down).

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