Multiple Choice Questions on If x 1 4 x 1 4 2 then what is the value of x81 1 x81 ........ for NDA Exam Preparation

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Multiple Choice Questions

If x 1 4 x 1 4 2 then what is the value of x81 1 x81 ........

Mathematics (NDA) Algebra
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    If x 1/4 + x-1/4=2 then what is the value of x81+ (1/x81)

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    Explanation:

    x1/4 + x-1/4=2
    x1/4 + 1/ (x4)=2
    (x 1/4 -1)2=0
    x 1/4=1
    x=1
    x81+ (1/x81)
    =1+1=2

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