Saved Bookmarks
| 1. |
If `A B`is a focal chord of `x^2-2x+y-2=0`whose focus is `S`and `A S=l_1,`then find `B Sdot` |
|
Answer» `x^(2)-2x+y-2=0` `orx^(2)-2x+1=3-y` `or(x-1)^(2)=-(y-3)` The length of its latus rectum is 1 unit. Since AS, 1/2, and BS are in HP, we have `(1)/(2)=(2ASxxBS)/(AS+BS)` `or" "BS=(l_(1))/((4l_(1)-1))` |
|