JEE Main 2019 Mathematics question
If the system of linear equations 2x + 2y + 3z = a, 3x − y + 5z = b, x − 3y + 2z = c where a, b, c are non zero real numbers, has more than one solution, then:
Answer: (A)
Solution
Δ = 0 and , so consistency needs a = b − c.