Published by:
CGP EDU Academic Team
Published on: August 12, 2026
Complete set of real values of ' 
' for which the equation 
has all its roots real :
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Here's a medium-short explanation:
Equation:
Derivative: 
For all roots real, derivative must have 3 real roots → cubic discriminant 
.
Discriminant condition:
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