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Math 9 Chapter 1 Matrices and Determinants-3
1.
Two matrices A and B are conformable for multiplication, giving product AB if?
a) The number of columns of A= the number of rows of A
b) The number of columns of A= the number of rows of B
c) The number of columns of B= the number of rows of B
d) The number of rows of A= the number of columns of B
2.
The associative law in matrices is given by?
a) (A+B)+C=A+(B+C)
b) AB=A=BA
c) A+B=A=B+A
d) (AB)C=A(BC)
3.
The left distributive in matrices is?
a) A+B=A=B+A
b) A(B+C)=AB+BC
c) (AB)C=A(BC)
d) (A+B)C=AC+BC
4.
Commutative law of multiplication of matrices is?
a) AB=AB
b) AB≠BA
c) AB=BA
d) None of these
5.
If A,B are two matrices and A
t
,B
t
are their respective transpose then?
a) B
t
=(AB)
t
b) A
t
=(AB)
t
c) (AB)
t
=B
t
A
t
d) A
t
= -A
6.
The determinant of matrix A is given by?
a) Both are true
b) Det A
c) │A│
d) Both are false
7.
The determinant of singular matrix is?
a) One
b) All of these
c) Negative
d) Zero
8.
Adjoint of a square matrix is obtained as?
a) By changing sign, other than diagonal
b) Both are true
c) Both are false
d) By interchanging the diagonal entries
9.
Adjoint of matrix A is denoted as?
a) │A│
b) Adj A
c) Det A
d) │A│
2
10.
The inverse of A is denoted By?
a) A
t
b) A
2
c) A
+1
d) A
-1
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