Class XII Let a, b, c, d, u, v be integers. If the system of equations, a x + b y = u, c x + dy = v, has a unique solution in integers, then ad - bc need not be equal to ±1 ad – bc = - 1 ad – bc = ±1 ad – bc = 1 If A and B are two matrices such that A + B and AB are both defined, then A and B can be any matrices number of columns of A = number of ros of B. A, B are square matrices of same order A, B are square matrices not necessarily of same order The system of equations x + 2y = 11,-2 x – 4y = 22 has no solution only one solution infinitely many solutions. finitely many solution The system of equations, x + y + z = 1, 3 x + 6 y + z = 8, ααx + 2 y + 3z = 1 has a unique solution for all rational α ααnot equal to 0 all integral α all real α The equations x + 2y + 2z = 1 and 2x + 4 y + 4z = 9 have only one solution infinitely many solutions. no solution only two solutions Do you really want to submit this quiz? Cancel Submit Quiz