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If the two linear equations \(a_1x+b_1y+c_1=0\) and \(a_2x+b_2y+c_2=0\) satisfy \(\frac{a_1}{a_2}=\frac{b_1}{b_2}=\frac{c_1}{c_2}\), what will be the nature of their lines and the number of solutions?

Answer and explanation

Correct answer: Coincident lines; infinitely many solutions

When \(\frac{a_1}{a_2}=\frac{b_1}{b_2}=\frac{c_1}{c_2}\), one equation is a multiple of the other. Hence, both equations represent the same line and have infinitely many solutions. For distinct parallel lines, \(\frac{a_1}{a_2}=\frac{b_1}{b_2}\ne\frac{c_1}{c_2}\), so option C is not correct. Exam tip: If all three ratios are equal, identify coincident lines with infinitely many solutions.

Related tags

Linear EquationsSolvability ConditionsCoincident LinesInfinite SolutionsClass 10 MathematicsConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematics

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