JEE Main · 2025 · 02 Apr 2025 · Shift 1 · Hyperbola

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Let one focus of the hyperbola be at and the corresponding directrix be . If and respectively are the eccentricity and the length of the latus rectum of , then is equal to:
  1. (A)14
  2. (B)15
  3. (C)16✓ Correct
  4. (D)12

Answer: (C)

Solution

Given: focus at means , and directrix means .

Multiplying these: .

Then , so .

Using .

Length of latus rectum: .

Therefore: .

JEE Main · 2025 · 02 Apr 2025 · Shift 1 · Single correct option

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