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Question

If the line
(3x+14y+7)+k(5x+7y+6)=0
is parallel to the y-axis, then the value of k is


A
13
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B
35
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C
2
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D
2
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Solution

The correct option is C 2

Given line is (3x+14y+7)+k(5x+7y+6)=0

(3+5k)x+(14+7k)y+(7+6k)=0

If it is parallel to y- axis, then coefficient of y =0

14+7k=0

k=2


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