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CGP EDU Academic Team
Published on: August 14, 2026
If P (at 1 2 , 2at 1 ) and Q (at 2 2 , 2at 2 ) are two variable points on the curve y 2 = 4ax and PQ subtends a right angle at the vertex, then t 1 t 2 is equal to -
Text Solution
Verified by ExpertsThe correct answer is:
D
m 1 m 2 (of AP and AQ) = – 1
⇒ 2/t 1 .2/t 2 = – 1 ∴ t 1 t 2 = – 4
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