Let be a tangent to the hyperbola . Then is equal to:
- (A)-2
- (B)-4
- (C)2
- (D)4✓ Correct
Answer: (D)
Solution
Substitute into the hyperbola equation :
For tangency, discriminant = 0:
Simplifying:
Dividing by : .
For tangency, discriminant = 0:
Simplifying:
Dividing by : .
JEE Main · 2022 · 24 Jun 2022 · Shift 1 · Single correct option