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				| 1. | Eccentricity (e) of the conic sections __________ when the distance of a point on the conic sections from the focus is f and the distance of the same point from the directrix is d. | 
| A. | d*f | 
| B. | d/f | 
| C. | f/d | 
| D. | d*f*0.5 | 
| E. | of the conic sections __________ when the distance of a point on the conic sections from the focus is f and the distance of the same point from the directrix is d.a) d*fb) d/fc) f/dd) d*f*0.5 | 
| Answer» D. d*f*0.5 | |