Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Let
B
=
(
1
2
1
−
1
1
0
3
−
2
4
)
.
B=\begin{pmatrix}1 & 2 & 1\\ -1 & 1 & 0\\ 3 & -2 & 4\end{pmatrix}.
B
=
1
−
1
3
2
1
−
2
1
0
4
.
Without writing the entire inverse, calculate the first row of
B
−
1
B^{-1}
B
−
1
.
Browse the problem library