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