Matrix Addition, Subtraction, and Multiplication
Precalculus · Flashcards
PRECALCULUS · FLASHCARDS
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QUESTION
What is
A
+
B
A+B
A
+
B
if
A
=
[
1
−
2
3
0
]
A=\begin{bmatrix}1&-2\\3&0\end{bmatrix}
A
=
[
1
3
−
2
0
]
and
B
=
[
4
5
−
1
2
]
B=\begin{bmatrix}4&5\\-1&2\end{bmatrix}
B
=
[
4
−
1
5
2
]
?
QUESTION
What is
3
A
3A
3
A
if
A
=
[
−
1
2
0
5
]
A=\begin{bmatrix}-1&2\\0&5\end{bmatrix}
A
=
[
−
1
0
2
5
]
?
QUESTION
What is
A
+
B
A+B
A
+
B
for
A
=
(
1
−
2
3
0
)
A=\begin{pmatrix}1&-2\\3&0\end{pmatrix}
A
=
(
1
3
−
2
0
)
and
B
=
(
4
5
−
1
2
)
B=\begin{pmatrix}4&5\\-1&2\end{pmatrix}
B
=
(
4
−
1
5
2
)
?
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ANSWER
(
5
3
2
2
)
\begin{pmatrix}5&3\\2&2\end{pmatrix}
(
5
2
3
2
)
. Add corresponding entries:
(
1
+
4
,
−
2
+
5
;
3
+
(
−
1
)
,
0
+
2
)
(1+4, -2+5; 3+(-1), 0+2)
(
1
+
4
,
−
2
+
5
;
3
+
(
−
1
)
,
0
+
2
)
.
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