Published by:
CGP EDU Academic Team
Published on: August 14, 2026
If y = m 1 x + c 1 and y = m 2 x + c 2 , 
are two common tangents of circle x 2 + y 2 = 2 and parabola y 2 = x, then the value of 8lm 1 m 2 l is equal to
A
3 + 4 
B
-5 + 6 
C
-4 + 3 
D
7 + 6 
Text Solution
Verified by ExpertsThe correct answer is:
C
C 1 : x 2 + y 2 = 2
C 2 : y 2 = x
Let tangent to parabola be y = mx + 
.
It is also a tangent of circle so distance from centre of circle (0, 0) will be 
.
by solving
(rejected)
so, 
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