Saved Bookmarks
| 1. |
Find the focus, equation of directrix and length of lactus rectum of x2 + 16y = 0 |
|
Answer» x2 = -16y Comparing with x2 = -4ay we get 4a = 16 ⇒ a = 4 ∴ Focus = S = (0,-4) Directrix is y = -4. Length of L.R = 4a = 16. |
|