JEE Main 2021 Mathematics question

The values of a and b, for which the system of equations 2x + 3y + 6z = 8, x + 2y + az = 5, 3x + 5y + 9z = b has no solution, are :

• (A)a = 3, b 13Correct
• (B)a 3, b 13
• (C)a3, b = 3
• (D)a = 3, b = 13