A) - 2
B) - 1
C) 2
D) 1
Correct Answer: C
Solution :
Given pair of lines is \[{{x}^{2}}-2cxy-7{{y}^{2}}=0\] Given, \[{{m}_{1}}+{{m}_{2}}=4{{m}_{1}}{{m}_{2}}\Rightarrow \frac{-2c}{7}=\frac{-4}{7}\Rightarrow c=2\] \[\left[ \because \ {{m}_{1}}+{{m}_{2}}=-\frac{2h}{b}=\frac{-2c}{7};\ {{m}_{1}}{{m}_{2}}=\frac{-1}{7} \right]\]You need to login to perform this action.
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