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Matrix Algebra
Matrix operations, inverses, and characterizations of invertibility.
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A
=
(
1
2
3
4
)
A = \begin{pmatrix}1&2\\3&4\end{pmatrix}
A
=
(
1
3
2
4
)
,
B
=
(
5
6
7
8
)
B = \begin{pmatrix}5&6\\7&8\end{pmatrix}
B
=
(
5
7
6
8
)
. What is the
(
1
,
2
)
(1,2)
(
1
,
2
)
entry of
A
+
B
A+B
A
+
B
?
Matrix notation and basic operations
Your answer
Draw
Hint
( )
x
n
√
⌫
AC
7
8
9
+
4
5
6
−
1
2
3
×
0
.
a
b
Check
÷
Q1
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