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Recent questions tagged matrix-algebra
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GATE Mechanical 2021 Set 2 | Question: 27
Let the superscript $\text{T}$ represent the transpose operation. Consider the function $f(x)=\frac{1}{2}x^TQx-r^Tx$, where $x$ and $r$ are $n \times 1$ vectors and $\text{Q}$ is a symmetric $n \times n$ matrix. The stationary point of $f(x)$ is $Q^{T}r$ $Q^{-1}r$ $\frac{r}{r^{T}r}$ $r$
go_editor
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Linear Algebra
Mar 1, 2021
by
go_editor
5.0k
points
gateme-2021-set2
linear-algebra
matrix-algebra
0
answers
0
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GATE2019 ME-2: 18
The transformation matrix for mirroring a point in $x – y$ plane about the line $y=x$ is given by $\begin{bmatrix} 1 & 0 \\ 0 & -1 \end{bmatrix} \\$ $\begin{bmatrix} -1 & 0 \\ 0 & 1 \end{bmatrix} \\$ $\begin{bmatrix} 0 & 1 \\ 1 & 0 \end{bmatrix} \\$ $\begin{bmatrix} 0 & -1 \\ -1 & 0 \end{bmatrix}$
Arjun
asked
in
Linear Algebra
Feb 9, 2019
by
Arjun
27.4k
points
gateme-2019-set2
linear-algebra
matrix-algebra
1
answer
0
votes
GATE Mechanical 2014 Set 4 | Question: 1
Which one of the following equations is a correct identity for arbitrary $3 \times 3$ real matrices $P$, $Q$ and $R$? $P(Q+R)=PQ+RP$ $(P-Q)^2 = P^2 -2PQ -Q^2$ $\text{det } (P+Q)= \text{det } P+ \text{det } Q$ $(P+Q)^2=P^2+PQ+QP+Q^2$
Arjun
asked
in
Linear Algebra
Feb 19, 2017
by
Arjun
27.4k
points
gateme-2014-set4
linear-algebra
matrices
matrix-algebra
0
answers
0
votes
GATE Mechanical 2014 Set 2 | Question: 18
If there are $m$ sources and $n$ destinations in a transportation matrix, the total number of basic variables in a basic feasible solution is $m + n$ $m + n + 1$ $m + n − 1$ $m$
Arjun
asked
in
Linear Algebra
Feb 19, 2017
by
Arjun
27.4k
points
gateme-2014-set2
linear-algebra
matrix-algebra
0
answers
0
votes
GATE Mechanical 2014 Set 1 | Question: 4
The matrix form of the linear syatem $\dfrac{dx}{dt}=3x-5y$ and $\dfrac{dy}{dt}=4x+8y$ is $\dfrac{d}{dt}\begin{Bmatrix} x\\y \end{Bmatrix}=\begin{bmatrix} 3 & -5\\ 4& 8 \end{bmatrix}\begin{Bmatrix} x\\y \end{Bmatrix} \\$ ...
Arjun
asked
in
Linear Algebra
Feb 19, 2017
by
Arjun
27.4k
points
gateme-2014-set1
linear-algebra
matrices
matrix-algebra
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