Published by:
CGP EDU Academic Team
Published on: August 13, 2026
If the planes 
and 
intersect in aline, then the possible number of realvalues of a is
Text Solution
Verified by ExpertsThe correct answer is:
D
0
all 3 planes intersect in a line
(2a - a 2 ) - 1 (1 - a) + 1 (a 2 - 2a 2 ) = 0
2a - a 2 - 1 + a - a 2 = 0
- 2a 2 + 3a - 1 = 0 
a = 1, 
for both values of a = 1, 
two of the given 3 planes are parallel (rejected)
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