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Question

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


A

1/3

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B

3/5

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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 y- coefficient =0

14+7k=0

k= 2


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