Let the domain of the function be the interval . Let the hyperbola have eccentricity and the length of the latus rectum . Then is equal to :
- (A)5
- (B)11
- (C)9
- (D)7✓ Correct
Answer: (D)
Solution
For the domain of , we need , which requires , so . This gives , yielding . Thus , .
For the hyperbola, , so , giving .
The latus rectum is . Substituting : , which gives and .
Therefore, .
For the hyperbola, , so , giving .
The latus rectum is . Substituting : , which gives and .
Therefore, .
JEE Main · 2026 · 23 Jan 2026 · Shift 1 · Single correct option