Multiple Choice Questions on x 1 x 2 2 then find the value of x94 x90 x82 x78 x64 x60 x54 x50 ........ for DRDO Exam Preparation

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Multiple Choice Questions

x 1 x 2 2 then find the value of x94 x90 x82 x78 x64 x60 x54 x50 ........

Quantitative Aptitude and Numerical Ability (DRDO) (Phase-i and II) Algebra
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    (x + 1/x)2= 2 then find the value of (x94+x90+x82+x78+x64+x60+x54+x50)

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    Explanation:

    Given (x+1/x)2=2
    or x2+ (1/x)2+2.x.1/x=2
    or x2+1/x2=0
    x4+1=0
    Now (x94+x90+x82+x78+x64+x60+x54+x50)
    =x90(x4+1)+x78(x4+1)+ x60(x4+1)+ x50(x4+1)
    =0

    By: MIRZA SADDAM HUSSAIN
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