Representing Linear Systems with Matrices
Algebra · Flashcards · Recall
ALGEBRA · FLASHCARDS
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QUESTION
What is the variable vector
x
⃗
\vec{x}
x
for a system in variables
x
x
x
and
y
y
y
written as
A
x
⃗
=
b
⃗
A\vec{x}=\vec{b}
A
x
=
b
?
QUESTION
What does each row of
A
A
A
correspond to when writing a system as
A
x
⃗
=
b
⃗
A\vec{x}=\vec{b}
A
x
=
b
?
QUESTION
What is the size of
A
A
A
for a system of
3
3
3
equations in
2
2
2
variables written as
A
x
⃗
=
b
⃗
A\vec{x}=\vec{b}
A
x
=
b
?
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ANSWER
3
×
2
3\times 2
3
×
2
. Three equations (rows) by two variables (columns).
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