Question
Mathematics Question on Coordinate Geometry
If x - 2y + k = 0 is a tangent to the parabola y2 - 4x - 4y + 8 = 0, then the value of k is
A
2
B
52
C
7
D
-7
Answer
7
Explanation
Solution
The correct option is: (C) 7
If x - 2y + k = 0 is a tangent to the parabola y2 - 4x - 4y + 8 = 0, then the value of k is
2
52
7
-7
7
The correct option is: (C) 7