Multiple Choice Questions on Find the sum of the series up to infinity 3 4 7 4 2 3 4 3 7 4 4 3 4 5 ........ for CDS Exam Preparation

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Multiple Choice Questions

Find the sum of the series up to infinity 3 4 7 4 2 3 4 3 7 4 4 3 4 5 ........

Quantitative Aptitude (CDS) Arithmetic progression
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    Find the sum of the series up to infinity  3/4 -7/4^2 +3/4^3 - 7/4^4 + 3/4^5 +....?

     

    1

    Incorrect Answer

    2/3
     

    Correct Answer

    16/3
     

    Incorrect Answer

    none of these

     

    Incorrect Answer
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    Explanation:

    sum= 3/4 -7/4^2 +3/4^3 - 7/4^4 + 3/4^5 - 7/4^6
    = 3/4 + 3/4^3  + 3/4^5....-7/4^2-7/4^4 -7/4^6 -7/4^8
    = (3/4) /1-(3/4) - [(7/4)/7/4 -1}
    =3 -7/3
    =2/3

    By: bhavesh kumar singh
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