JEE Main 2019 Mathematics question
The set of all values of λ for which the system of linear equations x − 2y − 2z = λx, x + 2y + z = λy, −x − y = λz has a non-trivial solution:
Answer: (C)
Solution
The determinant equals ⇒ λ = 1 only.
The set of all values of λ for which the system of linear equations x − 2y − 2z = λx, x + 2y + z = λy, −x − y = λz has a non-trivial solution:
The determinant equals ⇒ λ = 1 only.