The family of lines through the intersection of L1: a1x + b1y + c1 = 0 and L2: a2x + b2y + c2 = 0 is:

  1. L1 L2 = 0
  2. L1 = L2
  3. kL1 L2 = 1
  4. L1 + kL2 = 0
Answer

D) L1 + kL2 = 0

For any number k, L1 + kL2 = 0 is a line, and it is satisfied by the point where both L1 = 0 and L2 = 0. SLO M-09-B-11 · Understanding

Mathematics MCQ · More Angle Between Lines MCQs · Practise