JEE Main2019Math
Q.
Let and be the roots of the equation x2 + x + 1 = 0. Then for y 0 in R,\left| {\begin{array}{*{20}{c}}{y + 1}\alpha \beta \\ \alpha {y + \beta }1 \\ \beta 1{y + \alpha } \end{array}} \right|is equal to :
- A
y(y2 – 1)
- B
y3 – 1
- C
y(y2 – 3)
- D
y3
Solution
