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Mathematics ECAT Pre Engineering Chapter 5 Matrices and Determinants Online Test MCQs With Answers
Question # 1
If A is a skew-symmetric matrix of order n and P, any square matrix of order n, prove that P' AP is
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Skew-symmetric
Symmetric
Null
Diagonal
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Question # 2
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Question # 3
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(2x+a+b+c)
(a+b+c)
(a+b+c+x)
0
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Question # 4
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0
1
2
3
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Question # 5
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5
15
10
20
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Question # 6
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I
14 I
0
None of these
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Question # 7
A matrix with a single row is called a
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Column matrix
Row matrix
Null matrix
Identity matrix
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Question # 8
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x =0, y =4
x = -1, y = 2
x = 2, y = 3
x = 3, y = 4
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Question # 9
The additive inverse of a matrix A is
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None of these
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Question # 10
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Question # 11
(ABC)' =
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CBA'
CBA
C'B'A
C'B'A'
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Question # 12
The matrix A is Hermitian when (A)' =
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A
-A
A
A'
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Question # 13
If the trace of matrix A is 5, then the trace of the matrix 3A is
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3/5
5/3
8
15
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Question # 14
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A(
α
) - A(
β
)
A(
α
) + A(
β
)
A(
α
-
β
)
A(
α
+
β
)
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Question # 15
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Question # 16
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0
Independent of a
Independent of b
Independent of c
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Question # 17
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Question # 18
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Question # 19
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A
2
- 5A + 7I = 1
2A
2
- 3A + 7I = 0
A
2
- 5A + I = 0
A
2
- 5A + 7I = 0
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Question # 20
If A is a non singular matrix then A
-1
= ______
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Question # 21
If order of A is m x n, then order of A
t
is
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m x m
n x n
m x n
n x m
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