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The equation x ^(4) -2x ^(3) + 4x -1=0 h...

The equation `x ^(4) -2x ^(3) + 4x -1=0` has four distinct real roots `x _(1), x _(2), x _(3), x_(4)` such that `x _(1) lt x _(2) lt x _(3)lt x _(4)` and product of two roots is unity, then :
`x _(1), x _(2) =x_(1)x_(3) + x_(2) x _(4) +x_(3) x _(4)=`

A

0

B

1

C

`sqrt(5) `

D

`-1`

Text Solution

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The correct Answer is:
B
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