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  3. 10th Class
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  5. Pair of Linear Equations in Two Variables

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

  • question_answer
    If \[\frac{1}{x}+\frac{1}{y}=k\] and \[\frac{1}{x}-\frac{1}{y}=k\], then the value of y ________.

    A)  0                                

    B)  \[\frac{1}{k}\]            

    C)  1000 k             

    D)  Does not exist

    Correct Answer: D

    Solution :

    (d): Upon solving by subtracting two eqns., we get, \[\frac{2}{y}=0\Rightarrow y\to \infty \] i.e. y does not exist.


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