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Consider the quadratic equationx^2-mx+1=...

Consider the quadratic equation`x^2-mx+1=0` with two roots `alpha`and `beta` such that `alpha`+`beta`=m and `alpha``beta`=1 The value of m for which both the roots of the equation are less than unity are (A) `]-oo,-2]` (B) `[-2,2]` (C) `[2,oo]` (D) `]-oo,-2]cup[2,oo]`

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