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If alpha, beta be the roots of the quadr...

If `alpha, beta` be the roots of the quadratic equation `x^(2)-5x+k=0`, find the value of k such that `alpha-beta=1`:

A

`(-4,27/4)`

B

`(-2,27/4)`

C

`(6,27/4)`

D

`(6,oo)`

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The correct Answer is:
C
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