JEE Main · 2020 · 05 Sep 2020 · Shift 2 · Hyperbola

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If the line is a common tangent to the hyperbola and the circle , then which one of the following is true?
  1. (A)✓ Correct
  2. (B)
  3. (C)
  4. (D)

Answer: (A)

Solution

A line touches the circle when , and it touches the hyperbola when . A common tangent satisfies both, so . This gives , hence and . Then , so .

JEE Main · 2020 · 05 Sep 2020 · Shift 2 · Single correct option

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