A) 6
B) -6
C) 9
D) -9
Correct Answer: C
Solution :
(c): \[{{a}_{1}}x+{{b}_{1}}y+{{c}_{1}}=0\]and \[{{a}_{2}}x+{{b}_{2}}y+c=0\]will have no solution if \[\frac{{{a}_{1}}}{{{a}_{2}}}=\frac{{{b}_{1}}}{{{b}_{2}}}\ne \frac{{{c}_{1}}}{{{c}_{2}}}\Rightarrow \frac{1}{3}=\frac{3}{k}\] \[\Rightarrow k=9\]
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