At which points are the tangents drawn to the ellipse 3:2 + :92 z [a] x + [a] 3; parallel to the :1: -axis?

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CIN: a = 2

CIN: a = 2

At which points are the tangents drawn to the ellipse 3:2 + :92 z [a] x + [a] 3; parallel to the :1: -axis? Round the coordinates to two decimal places. Verify your solutiongraphically.