10th Class Mathematics Pair of Linear Equations in Two Variables Question Bank Pair of Linear Equations In Two Variables

  • question_answer
    What is the condition that a system of simultaneous equations \[{{a}_{1}}x+{{b}_{1}}y+{{c}_{1}}=0\] and \[{{a}_{2}}x+{{b}_{2}}y+{{c}_{2}}=0\]must satisfy to have exactly one solution?

    A)  \[\frac{{{a}_{1}}}{{{a}_{2}}}=\frac{{{b}_{1}}}{{{b}_{2}}}\]             

    B)         \[\frac{{{a}_{1}}}{{{a}_{2}}}\ne \frac{{{b}_{1}}}{{{b}_{2}}}\]

    C)  \[\frac{{{a}_{1}}}{{{a}_{2}}}=\frac{{{c}_{1}}}{{{c}_{2}}}\]               

    D)         \[\frac{{{b}_{1}}}{{{b}_{2}}}=\frac{{{c}_{1}}}{{{c}_{2}}}\]

    Correct Answer: B

    Solution :

     The system of simultaneous equations \[{{6}^{x}}={{(2\times 3)}^{x}}={{2}^{x}}\times {{3}^{x}}\]and \[\Rightarrow \], have exactly one (unique) solution if \[{{6}^{x}}\].


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