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Which condition ensures that the pair of linear equations \(a_1x+b_1y+c_1=0\) and \(a_2x+b_2y+c_2=0\) has infinitely many solutions?

Answer and explanation

Correct answer: \(\frac{a_1}{a_2}=\frac{b_1}{b_2}=\frac{c_1}{c_2}\)

When \(\frac{a_1}{a_2}=\frac{b_1}{b_2}=\frac{c_1}{c_2}\), both equations represent the same line. Hence, every point on that line satisfies both equations, giving infinitely many solutions. In option B, the lines are distinct and parallel, so there is no solution. Exam tip: For infinitely many solutions, all three ratios must be equal.

Related tags

Pair Of Linear EquationsInfinitely Many SolutionsCoincident LinesConsistency ConditionsClass 10 MathematicsConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematics

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