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    				| 1. | Find the length of the latus rectum of the parabola y2 = 4ax passing through the point (2, -6). | 
| Answer» Given equation of the parabola is y2 = 4ax and it passes through point (2, -6). Substituting x = 2 and y = -6 in y2 = 4ax, we get ⇒ (-6)2 = 4a(2) ⇒ 4a = 18 ∴ Length of latus rectum = 4a = 18 units | |