CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

An infinite number of tangents can be drawn from (1, 2) to the circle x2+y22x4y+λ=0, then λ=


  1. -20

  2. 0

  3. 5

  4. Cannot be determined


Solution

The correct option is C

5


Clearly the point (1, 2) is the centre of the given circle and infinite tangents can only be drawn on a point circle. Hence radius should be 0.
 12+22λ=0  λ=5.

flag
 Suggest corrections
thumbs-up
 
0 Upvotes


Similar questions
QuestionImage
QuestionImage
View More...



footer-image