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| 1. |
If S and S are two foci of the ellipse x2a2+y2b2=1 and B is an end of the minor axis such that △BSS′ is equilateral, then write the eccentricity of the ellipse. |
| Answer» If S and S are two foci of the ellipse x2a2+y2b2=1 and B is an end of the minor axis such that △BSS′ is equilateral, then write the eccentricity of the ellipse. | |