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What will (a) be for (2x+3y=5) and (4x+ay=11) to have no solution?

Answer and explanation

Correct answer: 6

For two linear equations to have no solution, the condition is \(\frac{a_1}{a_2}=\frac{b_1}{b_2}\ne\frac{c_1}{c_2}\). Here, \(\frac{2}{4}=\frac{1}{2}\). Thus, \(\frac{3}{a}=\frac{1}{2}\), which gives \(a=6\). Also, \(\frac{5}{11}\ne\frac{1}{2}\), so the two lines are distinct and parallel and have no common solution. Exam tip: For ‘no solution,’ first equate the ratios of the variable coefficients and then verify that the constants’ ratio is different.

Related tags

Linear EquationsNo SolutionConsistency ConditionsPair Of EquationsConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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