Coordinate Geometry: JEE Main 2008 Mathematics question

JEE Main 2008 · Annual, Paper 1 · Q3743

JEE Main 2008Annual, Paper 1MathematicsEasyCoordinate Geometry478× since 2002

A focus of an ellipse is at the origin. The directrix is the line

x=4

and the eccentricity is

{{1 \over 2}}

. Then the length of the semi-major axis is :

JEE Main 2008 · Annual, Paper 1 · Q3743

JEE Main 2008Annual, Paper 1MathematicsEasyCoordinate Geometry478× since 2002

A focus of an ellipse is at the origin. The directrix is the line

x=4

and the eccentricity is

{{1 \over 2}}

. Then the length of the semi-major axis is :

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