Practicing Success
If $A=\begin{bmatrix}0&-3&2\\a&b&8\\-2&c&0\end{bmatrix}$ is skew-symmetric matrix, then |
$b=0$ and $a+c=5$ $a=0$ and $b+c=5$ $b=0$ and $a+c=-5$ $c=0$ and $a+b=-5$ |
$b=0$ and $a+c=-5$ |
$A=\begin{bmatrix}0&-3&2\\a&b&8\\-2&c&0\end{bmatrix}$ $A^T=\begin{bmatrix}0&a&-2\\-3&b&c\\2&8&0\end{bmatrix}$ $(A=-A^T)$ skew symmetric $⇒\begin{bmatrix}0&-3&2\\a&b&8\\-2&c&0\end{bmatrix}=\begin{bmatrix}0&-a&2\\3&-b&-c\\-2&-8&0\end{bmatrix}$ On comparison $a=3$, $b=-b⇒b=0$ $c=-8$ $a+c=-5\,\,b=0$ |