Skip to content / Đến nội dung
ThichHocToan.com

SMO 2014 Senior Round 1 Question 1

SMO · SMO 2014 Senior Round 1

Question 1

If $\alpha,\beta$ are the roots of the equation $3x^2+x-1=0$, where $\alpha\gt \beta$, find the value of $\dfrac\alpha\beta+\dfrac\beta\alpha$.
  1. $\frac79$
  2. $-\frac79$
  3. $\frac73$
  4. $-\frac73$
  5. $-\frac19$