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| 1. |
An ellipse and a hyperbola have the same centre as origin, the same foci and the minor-axis of the one is the same as the conhugate axis of the other . If `e_1,e_2` be their eccentricities respectively, then `e_1^(-2)+e_2^(-2)` equalsA. 1B. 2C. 3D. 4 |
| Answer» Correct Answer - B | |