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JEE Main 2005 Mathematics question

MathematicsEllipseJEE Main 2005

An ellipse has OB as semi minor axis, F and F′ its focii and the angle FBF′ is a right angle. Then the eccentricity of the ellipse is

Answer: (1)

Solution

B = (0, b), F = (±ae, 0). means , so $OF =

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Question ID VK-038685