Let the eccentricity of the hyperbola be and length of its latus rectum be , If is a tangent to the hyperbola H , then the value of is equal to
- (A)18
- (B)20✓ Correct
- (C)24
- (D)32
Answer: (B)
Solution
For a hyperbola , the tangent with slope is . Here , so .
Given , we get , so .
The latus rectum is . Substituting : , giving .
Then .
Therefore .
Given , we get , so .
The latus rectum is . Substituting : , giving .
Then .
Therefore .
JEE Main · 2022 · 28 Jun 2022 · Shift 1 · Single correct option