MathDB
Problems
Contests
National and Regional Contests
Korea Contests
South Korea USCM
2019 Korea USCM
1
Find rank of 3by3 matrix
Find rank of 3by3 matrix
Source: 2019 South Korea USMC P1
August 13, 2020
linear algebra
too easy
rank
matrix
college contests
Problem Statement
A
=
(
2019
2020
2021
2020
2021
2022
2021
2022
2023
)
A = \begin{pmatrix} 2019 & 2020 & 2021 \\ 2020 & 2021 & 2022 \\ 2021 & 2022 & 2023 \end{pmatrix}
A
=
2019
2020
2021
2020
2021
2022
2021
2022
2023
. Find
rank
(
A
)
\text{rank}(A)
rank
(
A
)
.
Back to Problems
View on AoPS