Published by:
CGP EDU Academic Team
Published on: August 14, 2026
The pair of lines joining origin to the intersection of the curve 
+ 
= 1 by the line λ x + my + n = 0 are coincident if-
A
a 2 λ 2 + b 2 m 2 = n 2
B
C
= n 2
D
None of these
Text Solution
Verified by ExpertsThe correct answer is:
A
λ x + my + n = 0 ⇒ 
= 1
= 1 = 
x 2 + 
y 2 – 2 mxy = 0
This represent a pair of coincident lines if
λ 2 m 2 – 
= 0
= 
+ 
⇒ a 2 λ 2 + b 2 m 2 = n 2
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