A) \[k=1\]
B) \[k=-1\]
C) \[k\ne -1\]
D) \[k\ne 1\]
Correct Answer: B
Solution :
| For the pair of linear equations to be inconsistent. |
| \[\frac{{{a}_{1}}}{{{a}_{2}}}=\frac{{{b}_{1}}}{{{b}_{2}}}\ne \frac{{{c}_{1}}}{{{c}_{2}}}\,\,\,\,\,\,\,\,\,\,\,\,\Rightarrow \,\,\,\,\,\,\,\,\,\frac{-1}{1}=\frac{1}{k}\ne \frac{-1}{5}=k=-1\] So, option [b] is correct. |
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