Scroll:matrices >> find the value >> ps (4141)

Written Instructions:

For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..

For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.

Leave your answers in the simplest form or correct to two decimal places.


 

1)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
52
22
 		, B = 
1-2
35
 		and O = 
00
00
 

(i)  A+B =  

(ii)  A+(-A) = O

 


Answer:_______________




2)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
42
23
 		, B = 
1-2
22
 		and O = 
00
00
 

(i)  A+B =  

(ii)  A+(-A) = O

 


Answer:_______________




3)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
62
21
 		, B = 
3-2
42
 		and O = 
00
00
 

(i)  A+B =  

(ii)  A+(-A) = O

 


Answer:_______________




4)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
22
42
 		, B = 
2-2
33
 		and O = 
00
00
 

(i)  A+B =  

(ii)  A+(-A) = O

 


Answer:_______________




5)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
12
23
 		, B = 
1-2
41
 		and O = 
00
00
 

(i)  A+B =  

(ii)  A+(-A) = O

 


Answer:_______________




6)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
22
43
 		, B = 
4-2
54
 		and O = 
00
00
 

(i)  A+B =  

(ii)  A+(-A) = O

 


Answer:_______________




7)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
52
31
 		, B = 
2-2
42
 		and O = 
00
00
 

(i)  A+B =  

(ii)  A+(-A) = O

 


Answer:_______________




8)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
12
31
 		, B = 
1-2
31
 		and O = 
00
00
 

(i)  A+B =  

(ii)  A+(-A) = O

 


Answer:_______________




9)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
32
32
 		, B = 
3-2
52
 		and O = 
00
00
 

(i)  A+B =  

(ii)  A+(-A) = O

 


Answer:_______________




10)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
42
31
 		, B = 
2-2
55
 		and O = 
00
00
 

(i)  A+B =  

(ii)  A+(-A) = O

 


Answer:_______________




 

1)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
52
22
 		, B = 
1-2
35
 		and O = 
00
00
 

(i)  A+B = Answer: B+A  

(ii)  A+(-A) = O Answer: (-A)+A

 


SOLUTION 1 :

 Given:

 

A = 
52
22
 		, B = 
1-2
35
 		and O = 
00
00
 

(i) To prove:   A+B = B+A

A+B
 
5 2
2 2
+
1-2
35
= 
60
57
 		....(1)
B+A
1 -2
3 5
+
52
22
= 
60
57
 		....(2)

 From (1) and (2)

A+B = B+A.

(ii) To prove A+(-A) = O = (-A)+A

A+ (-A)
52
22
 +
-5-2
-2-2
= 
00
00
= O ...(3)
(-A) + A
-5-2
-2-2
 +

 

52
22

 

= 
00
00
 		= O...(4)

From (3) and (4) 

A+(-A) = O = (-A)+A

 

 

 



2)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
42
23
 		, B = 
1-2
22
 		and O = 
00
00
 

(i)  A+B = Answer: B+A  

(ii)  A+(-A) = O Answer: (-A)+A

 


SOLUTION 1 :

 Given:

 

A = 
42
23
 		, B = 
1-2
22
 		and O = 
00
00
 

(i) To prove:   A+B = B+A

A+B
 
4 2
2 3
+
1-2
22
= 
50
45
 		....(1)
B+A
1 -2
2 2
+
42
23
= 
50
45
 		....(2)

 From (1) and (2)

A+B = B+A.

(ii) To prove A+(-A) = O = (-A)+A

A+ (-A)
42
23
 +
-4-2
-2-3
= 
00
00
= O ...(3)
(-A) + A
-4-2
-2-3
 +

 

42
23

 

= 
00
00
 		= O...(4)

From (3) and (4) 

A+(-A) = O = (-A)+A

 

 

 



3)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
62
21
 		, B = 
3-2
42
 		and O = 
00
00
 

(i)  A+B = Answer: B+A  

(ii)  A+(-A) = O Answer: (-A)+A

 


SOLUTION 1 :

 Given:

 

A = 
62
21
 		, B = 
3-2
42
 		and O = 
00
00
 

(i) To prove:   A+B = B+A

A+B
 
6 2
2 1
+
3-2
42
= 
90
63
 		....(1)
B+A
3 -2
4 2
+
62
21
= 
90
63
 		....(2)

 From (1) and (2)

A+B = B+A.

(ii) To prove A+(-A) = O = (-A)+A

A+ (-A)
62
21
 +
-6-2
-2-1
= 
00
00
= O ...(3)
(-A) + A
-6-2
-2-1
 +

 

62
21

 

= 
00
00
 		= O...(4)

From (3) and (4) 

A+(-A) = O = (-A)+A

 

 

 



4)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
22
42
 		, B = 
2-2
33
 		and O = 
00
00
 

(i)  A+B = Answer: B+A  

(ii)  A+(-A) = O Answer: (-A)+A

 


SOLUTION 1 :

 Given:

 

A = 
22
42
 		, B = 
2-2
33
 		and O = 
00
00
 

(i) To prove:   A+B = B+A

A+B
 
2 2
4 2
+
2-2
33
= 
40
75
 		....(1)
B+A
2 -2
3 3
+
22
42
= 
40
75
 		....(2)

 From (1) and (2)

A+B = B+A.

(ii) To prove A+(-A) = O = (-A)+A

A+ (-A)
22
42
 +
-2-2
-4-2
= 
00
00
= O ...(3)
(-A) + A
-2-2
-4-2
 +

 

22
42

 

= 
00
00
 		= O...(4)

From (3) and (4) 

A+(-A) = O = (-A)+A

 

 

 



5)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
12
23
 		, B = 
1-2
41
 		and O = 
00
00
 

(i)  A+B = Answer: B+A  

(ii)  A+(-A) = O Answer: (-A)+A

 


SOLUTION 1 :

 Given:

 

A = 
12
23
 		, B = 
1-2
41
 		and O = 
00
00
 

(i) To prove:   A+B = B+A

A+B
 
1 2
2 3
+
1-2
41
= 
20
64
 		....(1)
B+A
1 -2
4 1
+
12
23
= 
20
64
 		....(2)

 From (1) and (2)

A+B = B+A.

(ii) To prove A+(-A) = O = (-A)+A

A+ (-A)
12
23
 +
-1-2
-2-3
= 
00
00
= O ...(3)
(-A) + A
-1-2
-2-3
 +

 

12
23

 

= 
00
00
 		= O...(4)

From (3) and (4) 

A+(-A) = O = (-A)+A

 

 

 



6)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
22
43
 		, B = 
4-2
54
 		and O = 
00
00
 

(i)  A+B = Answer: B+A  

(ii)  A+(-A) = O Answer: (-A)+A

 


SOLUTION 1 :

 Given:

 

A = 
22
43
 		, B = 
4-2
54
 		and O = 
00
00
 

(i) To prove:   A+B = B+A

A+B
 
2 2
4 3
+
4-2
54
= 
60
97
 		....(1)
B+A
4 -2
5 4
+
22
43
= 
60
97
 		....(2)

 From (1) and (2)

A+B = B+A.

(ii) To prove A+(-A) = O = (-A)+A

A+ (-A)
22
43
 +
-2-2
-4-3
= 
00
00
= O ...(3)
(-A) + A
-2-2
-4-3
 +

 

22
43

 

= 
00
00
 		= O...(4)

From (3) and (4) 

A+(-A) = O = (-A)+A

 

 

 



7)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
52
31
 		, B = 
2-2
42
 		and O = 
00
00
 

(i)  A+B = Answer: B+A  

(ii)  A+(-A) = O Answer: (-A)+A

 


SOLUTION 1 :

 Given:

 

A = 
52
31
 		, B = 
2-2
42
 		and O = 
00
00
 

(i) To prove:   A+B = B+A

A+B
 
5 2
3 1
+
2-2
42
= 
70
73
 		....(1)
B+A
2 -2
4 2
+
52
31
= 
70
73
 		....(2)

 From (1) and (2)

A+B = B+A.

(ii) To prove A+(-A) = O = (-A)+A

A+ (-A)
52
31
 +
-5-2
-3-1
= 
00
00
= O ...(3)
(-A) + A
-5-2
-3-1
 +

 

52
31

 

= 
00
00
 		= O...(4)

From (3) and (4) 

A+(-A) = O = (-A)+A

 

 

 



8)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
12
31
 		, B = 
1-2
31
 		and O = 
00
00
 

(i)  A+B = Answer: B+A  

(ii)  A+(-A) = O Answer: (-A)+A

 


SOLUTION 1 :

 Given:

 

A = 
12
31
 		, B = 
1-2
31
 		and O = 
00
00
 

(i) To prove:   A+B = B+A

A+B
 
1 2
3 1
+
1-2
31
= 
20
62
 		....(1)
B+A
1 -2
3 1
+
12
31
= 
20
62
 		....(2)

 From (1) and (2)

A+B = B+A.

(ii) To prove A+(-A) = O = (-A)+A

A+ (-A)
12
31
 +
-1-2
-3-1
= 
00
00
= O ...(3)
(-A) + A
-1-2
-3-1
 +

 

12
31

 

= 
00
00
 		= O...(4)

From (3) and (4) 

A+(-A) = O = (-A)+A

 

 

 



9)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
32
32
 		, B = 
3-2
52
 		and O = 
00
00
 

(i)  A+B = Answer: B+A  

(ii)  A+(-A) = O Answer: (-A)+A

 


SOLUTION 1 :

 Given:

 

A = 
32
32
 		, B = 
3-2
52
 		and O = 
00
00
 

(i) To prove:   A+B = B+A

A+B
 
3 2
3 2
+
3-2
52
= 
60
84
 		....(1)
B+A
3 -2
5 2
+
32
32
= 
60
84
 		....(2)

 From (1) and (2)

A+B = B+A.

(ii) To prove A+(-A) = O = (-A)+A

A+ (-A)
32
32
 +
-3-2
-3-2
= 
00
00
= O ...(3)
(-A) + A
-3-2
-3-2
 +

 

32
32

 

= 
00
00
 		= O...(4)

From (3) and (4) 

A+(-A) = O = (-A)+A

 

 

 



10)  

 Verify (i)  A+B =B+A   (ii)  A+(-A) = O = (-A)+A.


If A = 
42
31
 		, B = 
2-2
55
 		and O = 
00
00
 

(i)  A+B = Answer: B+A  

(ii)  A+(-A) = O Answer: (-A)+A

 


SOLUTION 1 :

 Given:

 

A = 
42
31
 		, B = 
2-2
55
 		and O = 
00
00
 

(i) To prove:   A+B = B+A

A+B
 
4 2
3 1
+
2-2
55
= 
60
86
 		....(1)
B+A
2 -2
5 5
+
42
31
= 
60
86
 		....(2)

 From (1) and (2)

A+B = B+A.

(ii) To prove A+(-A) = O = (-A)+A

A+ (-A)
42
31
 +
-4-2
-3-1
= 
00
00
= O ...(3)
(-A) + A
-4-2
-3-1
 +

 

42
31

 

= 
00
00
 		= O...(4)

From (3) and (4) 

A+(-A) = O = (-A)+A