Multiple Choice Questions on The roots of the equation q r x2 r p x p q 0 are ........ for NDA Exam Preparation

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Multiple Choice Questions

The roots of the equation q r x2 r p x p q 0 are ........

Mathematics (NDA) Arithmetic progression
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    The roots of the equation

    (q-r) x2 + (r-p)x + (p-q) = 0 are

    (r-p) / (q-r), 1/2

    Incorrect Answer

    (p-q) / (q-r), 1

    Correct Answer

    (q -r )/ (p -q ), 1

    Incorrect Answer

     (r -p )/ (p - q), 1/2

    Incorrect Answer
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    Explanation:

    For any equation of form, ax2 + bx + c = 0, 
    if sum of its coefficients is zero then one of its root is 1 and other will be given by c/a.
    Sum of the coefficients of given equation = q-r + r-p + p-q = 0
    Therefore roots are: 1, p-q/q-r

    By: Yachna
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