Multiple Choice Questions on If a2 ndash 1 a 5 then what is the value of a6 ndash 1 a3 ........ for CDS Exam Preparation

Back to Main Page

Multiple Choice Questions

If a2 ndash 1 a 5 then what is the value of a6 ndash 1 a3 ........

Quantitative Aptitude (CDS) Algebra
    Download Solution PDF

    If a2 – 1 / a = 5, then what is the value of a6 – 1 / a3 ?

    125

    Incorrect Answer

    – 125

    Incorrect Answer

    140

    Correct Answer

    -140

    Incorrect Answer
    छोटे Courses बड़े Results
    Master Algebra
    Prepare through Micro-courses
    Try Now
    Explanation:

    (a2-1)/a = 5
    a -1/a = 5 …..(i)
    cube both the sides
    a3 -1/a3 – 3*a*1/a*(a-1/a) =125
    a3- 1/a3 -3*5 =125 (using equation (i))
    a3 -1/a3= 140
    or, (a6 -1)/a3= 140

    By: Munesh Kumari
    ProfileResources

    Please Wait..

    Let's Discuss

    Please Wait..
    Master
    Algebra
    With abhipedia
    Micro Courses
    Try Now

    Please Wait..

    What our students have to say
    Review on us
    Download Abhipedia Android App

    Access to prime resources

    Downlod from playstore
    download android app download android app for free