A) \[5kx-7ky+2k=0\]
B) \[5kx+7ky+2k=0\]
C) \[5kx-7ky-2k=0\]
D) \[2kx-7ky+5k=0\]
Correct Answer: A
Solution :
[a] Given, one equation of a pair of dependent linear equation is \[5x-7y+2=0,\]then second equation is coincident of it. |
\[\therefore \,\,\,\,\,\,\,\,\,\,\,\,\,\,k(5x-7y+2)=0\] |
\[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,\,\,\,5kx-7ky+2k=0\] |
where, k is any arbitrary number. |
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