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10th Class Mathematics Related to Competitive Exam Question Bank Algebra

  • question_answer
    If the roots of the equation \[a{{x}^{2}}+bx+c=0\] are reciprocal of each other; then

    A)  a = b              

    B)         a = c  

    C)  b = c                     

    D)         a = 0

    Correct Answer: B

    Solution :

     Let the roots are\[\alpha ,\,\,\frac{1}{\alpha }\].                 \[\alpha .\frac{1}{\alpha }=\frac{c}{a}\] or            \[1=\frac{c}{a}\] or            \[c=a\]


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