JEE Main2019Math
Q.
If a circle C passing through the point (4,0) touches the circle x2 + y2 + 4x – 6y = 12 externally at the point (1, –1), then the radius of C is :
- A
- B
4
- C
- D
5
Solution
If a circle C passing through the point (4,0) touches the circle x2 + y2 + 4x – 6y = 12 externally at the point (1, –1), then the radius of C is :
4
5