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Revision: Matrices

Total questions: 13

Worksheet time: 8mins

Name
Class
Date
1.

a)

Order: 2 x 4

b)

Order: 4 x 2

2.

Choose CORRECT statements.

a)

I & II

b)

II & III

c)

III & IV

d)

II, IIII & IV

3.

Choose CORRECT answers.

a)

 x=2x=-2  

b)

 x=2x=2  

c)

 y=1y=-1  

d)

 y=1y=1  

4.

Calculate the following multiplication of two matrices.

a)
b)
c)
d)
5.

Calculate

a)
b)
6.

Calculate

a)
b)
c)
7.

Calculate determinant for matrix A.

a)

5

b)

6

c)

13

d)

14

8.

Calculate determinant for matrix A.

a)

0

b)

2

c)

3

d)

4

9.

Find the inverse of matrix A.

a)
b)

Inverse does not exist.

10.

Choose CORRECT statements.

a)

m13=2m_{13}=2

b)

m32=9m_{32}=-9

c)

c13=2c_{13}=-2

d)

c32=9c_{32}=9

11.

Find the adjoint for the following matrix.

a)
b)
12.

All are correct EXCEPT

a)

 a11=9a_{11}=9  

b)

 a24=3a_{24}=3  

c)

 a33=4a_{33}=4  

d)

 a41=0a_{41}=0  

13.

What can we say about above the matrices?

a)

A=13BA=\frac{1}{3}B

b)

A=3BA=3B

c)

B=3AB=3A

d)

B=13AB=\frac{1}{3}A