Using Matrices to Represent, Manipulate Data
Precalculus · Flashcards · Recall
PRECALCULUS · FLASHCARDS
Card 1
of 30
0 got it
0 to review
Current
Got it
Still learning
Not seen
QUESTION
What is the inverse formula for a
2
×
2
2\times 2
2
×
2
matrix
A
=
[
a
b
c
d
]
A=\begin{bmatrix}a&b\\c&d\end{bmatrix}
A
=
[
a
c
b
d
]
when invertible?
QUESTION
What does the incidence matrix entry mean if column
e
e
e
is edge
u
→
v
u\to v
u
→
v
in a directed graph?
QUESTION
What are the dimensions of
A
B
AB
A
B
if
A
A
A
is
m
×
n
m \times n
m
×
n
and
B
B
B
is
n
×
p
n \times p
n
×
p
?
Tap to flip before you grade
ANSWER
A
B
AB
A
B
is
m
×
p
m \times p
m
×
p
. Product dimensions: outer dimensions of the factors.
Swipe → got it · swipe ← still learning
Got it
Still learning
Flip Card
Previous card
Next card