Question # 1

If A is skew Hermitian Matrix then which of the following is not skew Hermitian matrix

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A2

A5

A3

A7

The additive inverse of a matrix A is

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None of these

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a = 2, b = 3

a = 3, b = 2

a = 2, b = 1, 2

a = 3, b = 3

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If order of A is m x n, then order of A^tis

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m x m

n x n

m x n

n x m

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1, 2, 3

1, 5, 9

2, 5, 8

3, 6, 9

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Every identity matrix is

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Row-vector

Scalar

Column-vector

All

Let A be a square matrix. Then, 1/2 (A-A') is

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Skew-symmetric

Symmetric

Null

None of the above

A = [3] is a/an

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Square matrix

Scalar matrix

Diagonal matrix

Identity matrix

Matrix multiplication is

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Commutative

Not commutative

Not associative

Not distributive

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0

1

2

3

The order of the matrix A is 3 x 5 and that of B is 2 x 3.The order of the matrix BA is

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2 x 3

3 x 2

2 x 5

5 x 2

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Orthogonal

Involutary

Idempotent

Nilpotent

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3 x 1

1 x 3

3 x 3

1 x 1

If A is singular then |A| = ______

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1

0

2

None of these

The square matrix A is skew-symmetric when At =

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-B

-C

-A

-D

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x =0, y =4

x = -1, y = 2

x = 2, y = 3

x = 3, y = 4

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A square matrix all of whose elements except the main diagonal are zeros is called a

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Null matrix

Singular matrix

Symmetric matrix

Diagonal matrix

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