JEE Main 2018
Matrices & Determinants
Matrices and Determinants
Easy
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 :
Options
Solution
D = \left| {\matrix{ 2 & 3 & 6 \cr 1 & 2 & a \cr 3 & 5 & 9 \cr } } \right| = 3 - a D = \left| {\matrix{ 2 & 3 & 8 \cr 1 & 2 & 5 \cr 3 & 5 & b \cr } } \right| = b - 13 If a = 3, b 13, no solution.