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8th Class Mathematics Algebraic Expressions Question Bank Algebra

  • question_answer
    If \[\frac{1}{m}+\frac{1}{n}=-3\] and\[mn=-\frac{1}{54}\], then find the value of\[\frac{1}{{{m}^{3}}}+\frac{1}{{{n}^{3}}}\].

    A) \[\frac{1}{212}\]      

    B)                   -513        

    C) \[-\frac{1}{219}\]                      

    D) 517

    E) None of these

    Correct Answer: B

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