Precalculus Quiz
20 questions · no time limit
0:00
Finish quiz
MATRIX OPERATIONS & APPLICATIONS
Question 1
of 20
Flag for review
No time limit
Current
Answered
Flagged
Not seen
Let
A
=
[
3
5
2
4
]
A=\begin{bmatrix}3 & 5\\ 2 & 4\end{bmatrix}
A
=
[
3
2
5
4
]
. Based on the determinant, does matrix
A
A
A
have an inverse? Why or why not?
A
No;
det
(
A
)
=
0
\det(A)=0
det
(
A
)
=
0
, so
A
A
A
is singular.
B
Yes;
det
(
A
)
=
2
≠
0
\det(A)=2\neq 0
det
(
A
)
=
2
=
0
, so
A
A
A
is non-singular.
C
Yes;
det
(
A
)
=
2
≠
0
\det(A)=2\neq 0
det
(
A
)
=
2
=
0
, so
A
A
A
has an inverse.
D
No;
det
(
A
)
=
2
≠
0
\det(A)=2\neq 0
det
(
A
)
=
2
=
0
, so
A
A
A
has no inverse.
YOUR PROGRESS
20
QUESTIONS
Ready when you are
Answer in any order. Your progress shows here as you go.
QUESTIONS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
KEYBOARD
Pick an answer
A
B
C
D
Next question
↵
→
Previous
←
Flag for review
F