conic-section

Question: An ellipse has OB as semi minor axis, F and F' its foci and the angle FBF' is a right angle. Then the eccentricity of the ellipse is



1) $\frac{1}{4}$
2) $\frac{1}{\sqrt{3}}$
3) $\frac{1}{\sqrt{2}}$
4) $\frac{1}{2}$
Solution: Explanation: No Explanation
Ellipse

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