Multiple Choice Questions on 40m2 13m 1 0 18n2 77n 18 0 ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

40m2 13m 1 0 18n2 77n 18 0 ........

Quantitative Aptitude ( CCS) Quadratic Equations
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    40m2-13m+1=0

    18n2+77n-18=0

    m<n

    Incorrect Answer

    m<=n

    Incorrect Answer

    m>n

    Incorrect Answer

    m>=n

    Correct Answer
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    Explanation:

    40m2-13m+1=0
    40m2 -8m-5m+1=0
    8m(5m -1) -1(5m -1)=0
    (5m-1) ( 8m-1)=0
    m= 1/5 , 1/8
    18n2+77n-18=0
    18n2 +81n- 4n -18=0
    9n( 2n+9) – 2(2n+9)=0
    (2n+9) ( 9n-2)=0
    n= -9/2, 2/9
    Hence m ≥ n

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