1) The vertices of the ellipse 9y2+25x2=225 are: a) (0;-5) (0;5) b) (-3;0) (3;0) c) (-5;0) (5;0) d) (0;-3) (0;3) 2) What is the equation of the focal axis of the ellipse 12x2+y2=12 ?   a) x=0 b) y=0 c) y=√12 d) y=2√12 3) The eccentricity of the ellipse  9x2+36y2=324 a) 0,86 b) 1,2 c) 1,6 d) 0,6 4) The length of the semi major axis of an ellipse is 4, the eccentricity is 0.3. What is the distance from a focus of the ellipse to the vertex? a) 2,8 b) 1,2 c) 6/5 d) None of these 5) What is the length of the focal axis of the ellipse 11x2+y2=11 a) y=0 b) x=0 c) y=√10 d) None of these 6) What is the length of the semi minor axis of the ellipse 16x2+ 9y2=144? a) 6 b) 8 c) 4 d) 3 7) What are the foci of the ellipse  7x2+ 25y2=175? a) ( 18;0) e (-18;0) b) (0;18) e (0;-18) c) (√18;0) e (-√18;0) d) None of these

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