0 votes
2 answers
243
0 votes
2 answers
245
Two eigenvalues of $3 \times 3$ matrix $\mathbf{X}$ are $(1+i)$ and $2$. The determinant of the text matrix $\mathrm{X}$ is __________.
1 votes
2 answers
246
0 votes
1 answer
254
The function $f(x)=1+2 x+3 x^{2}+\cdots+2026 x^{2025}$. Which of the following statement is true?$f(x)$ has global minimum$f(x)$ has global maximum$f(x)$ does not have gl...
0 votes
1 answer
256
Consider the following joint distribution of random variables $\mathrm{X}$ and $\mathrm{Y}$: $f(x, y)=\left\{\begin{array}{cl}\frac{x\left(1+3 y^2\right)}{4}, & 0 \leq x ...
0 votes
1 answer
257
For matrix $H=\left[\begin{array}{cc}3 & -1 \\ -1 & 3\end{array}\right]$, one of the eigenvectors is $\left[\begin{array}{l}-1 \\ -1\end{array}\right]$. Then, the other e...
0 votes
3 answers
259
Consider a matrix $\left[\begin{array}{lll}0 & 1 & 0 \\ a & 2 & d \\ b & 3 & c\end{array}\right]$. The matrix cannot have rank.$0$$1$$2$$3$