81
The system of linear equations $px+qy = r$ and $p_1x + q_1y = r_1$ has a unique
solution, if :
solution, if :
- (a)$pq \neq p_1q_1$
- (b)$pp_1 \neq qq_1$
- (c)$pq_1 \neq qp_1$
- (d)$pqr \neq p_1q_1r_1$
Show SolutionHide Solution↓
Ans. (c) $pq_1 \neq qp_1$