A) 8
B) 7
C) 6
D) 5
Correct Answer: D
Solution :
\[5x+3y+2=0\Rightarrow 3y=-5x-2\Rightarrow y=\frac{-5}{3}x-\frac{2}{3}\] \[\Rightarrow \]\[3x-ky+6=0\] \[\Rightarrow \]\[ky=3x+6\]\[\Rightarrow \]\[y=\frac{3}{k}x+\frac{6}{k}\] The lines will be perpendicular to each other if \[\frac{-\,5}{3}\times \frac{3}{k}=-1\]\[\Rightarrow \]\[k=5\] Hence, k = 5You need to login to perform this action.
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