MCQ
Let $A = \left[ {\begin{array}{*{20}{c}}
1&2&3\\
2&2&{ - 1}\\
3&0&k
\end{array}} \right]$ and $f(x) = {x^3} - 2{x^2} - \alpha x + \beta = 0$ . If $A$ satisfies $f(x)=0$ ,then
1&2&3\\
2&2&{ - 1}\\
3&0&k
\end{array}} \right]$ and $f(x) = {x^3} - 2{x^2} - \alpha x + \beta = 0$ . If $A$ satisfies $f(x)=0$ ,then
- A$k = 1, \alpha = 14$
- B$\alpha = 13,\beta = 22$
- ✓$k = - 1,\beta = 22$
- D$\alpha = - 14,\beta = - 22$