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If a₁ = 4, b₁ = 6, c₁ = 10 and a₂ = 2, b₂ = 3, c₂ = 5, how will the lines be related?

Answer and explanation

Correct answer: Coincident

For the pair of linear equations a₁x+b₁y+c₁=0 and a₂x+b₂y+c₂=0, the lines are coincident when a₁/a₂ = b₁/b₂ = c₁/c₂. Here, 4/2 = 2, 6/3 = 2, and 10/5 = 2. Since all three ratios are equal, the second equation is exactly one-half of the first equation. Both equations therefore represent the same line, so infinitely many points satisfy the pair. Option B, coincident, is correct. Parallel distinct lines would require the first two ratios to be equal but different from the constant ratio; intersecting lines would require unequal coefficient ratios. Thus A and C do not fit, and D is not a valid classification here.

Related tags

Coincident LinesRatio TestSolvabilityConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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