Practicing Success
If the matrix $\begin{bmatrix} x-y & 1 & -2\\2x-y & 0 & 3 \\2 & -3 & 0 \end{bmatrix}$ is skew-symmetric, then values of x and y are respectively |
$\frac{1}{2}, 1$ $1, \frac{1}{2}$ $1, 1$ $-1, -1$ |
$-1, -1$ |
The correct answer is Option (4) → $-1, -1$ $\begin{bmatrix} x-y & 1 & -2\\2x-y & 0 & 3 \\2 & -3 & 0 \end{bmatrix}=\begin{bmatrix} -x+y & -2x+y & -2\\-1 & 0 & 3 \\2 & -3 & 0 \end{bmatrix}$ skew symmetric $x-y=-x+y$ $⇒x=y$ so $2x-y=-1$ so $x=-1=y$ |