When is a pair of linear equations $a_1x+b_1y+c_1=0$ and $a_2x+b_2y+c_2=0$ is inconsistent?
Solution:
Given equations are: $a_1x+b_1y+c_1=0$ and $a_2x+b_2y+c_2=0$
The given equations are consistent:
$( i)\. if\ \frac{a_1}{a_2}≠\frac{b_1}{b_2}$, th4e given equations have one unique solution.
Then, the given pair of equations is consistent with exact one solution.
$( ii)$. If $\frac{a_1}{a_2}=\frac{b_1}{b_2}=\frac{c_1}{c_2}$
The given pair of equations have infinite solution.
Then, given pair of equations is consistent with infinite solutions.
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