Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
If
A
=
[
2
3
5
−
2
]
A = \begin{bmatrix} 2 & 3 \\ 5 & -2 \end{bmatrix}
A
=
[
2
5
3
−
2
]
, show that
A
−
1
=
1
19
A
A^{-1} = \frac{1}{19}A
A
−
1
=
19
1
A
.
Browse the problem library