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Question

For what value of k will the equations x + 2y + 7 = 0, 2x + ky + 14 = 0 represents coincident lines?
  1. 9
  2. 6
  3. 4
  4. 3


Solution

The correct option is C 4
Condition for coincident lines is a1a2=b1b2=c1c2 
12=2kk=4 

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