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If the matrix $\begin{bmatrix} 3 & a+b & 4\\2 & 0 & -1\\a-b & c & 5\end{bmatrix}$ is symmetric, then the value of a, b and c is given by : |
$a=3, b=-1, c=-1$ $a=3, b=-1, c=1$ $a=-3, b=1, c=-1$ $a=-3, b=1, c=1$ |
$a=3, b=-1, c=-1$ |
