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CGP EDU Academic Team
Published on: August 12, 2026
If the points (2,-1), (5,k) are conjugate w.r.t. x 2 = 8y, then k =
Text Solution
Verified by ExpertsThe correct answer is:
B
If (x 1 , y 1 ) and (x 2 , y 2 ) are conjugate points w.r.to a parabola S = 0, then S 12 = 0
∴ ∴ x 1 .x 2 – 2a(y 1 +y 2 ) = 0
⇒ ⇒ 2x5 – 4 (-1 + k) = 0
⇒ ⇒ k = 7/2
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