Answer (Choose 1 answer)
(See picture)
A. s=0~t=0
B. s=0.t=0 or s=4 t=2
C. s=?~t=4
D. s=0 t=0 or s=2 t=4
Exit 13
Let A=[\begin{matrix}1&2s-t&t^{3}\\ s+t&2&1\\ st&1&4\end{matrix}]. that the matrix A is symmetric.Find all pairs of real numbers (s, t) such
