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Which condition ensures that the pair of linear equations \(a_1x+b_1y=c_1\) and \(a_2x+b_2y=c_2\) has exactly one solution?

Answer and explanation

Correct answer: \(a_1b_2\ne a_2b_1\)

\(a_1b_2\ne a_2b_1\) makes the lines non-parallel, so they meet once. In option B, proportional coefficients with unequal constants give no solution. Exam tip: compare cross-products.

Related tags

Pair Of Linear EquationsSolvability ConditionsUnique SolutionDeterminantGrade 10 MathematicsConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematics

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