Multiple Choice Questions on If alpha beta are the roots of 2x sup2 x 1 0 then find the value of 1 alpha 1 ndash beta is ........ for CDS Exam Preparation

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Multiple Choice Questions

If alpha beta are the roots of 2x sup2 x 1 0 then find the value of 1 alpha 1 ndash beta is ........

Quantitative Aptitude (CDS) Quadratic Equations
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    If α,β are the roots of 2x²-x+1=0 then find the value of ( 1 - α ) ( 1 –β ) is. 

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    Explanation:

    equation ax²+bx+c = a( x – α ) (x- β )
     2x²-x+1 = 2. ( x – α ) (x- β )
    Putting values x = 1 we get   ( 1 - α ) ( 1 –β) = 1

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