Question # 1

AB = BA = 1 , then B is said to

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Ad joint of matrix of A

Inverse matrix of A

Determinant of A

Cofactor of a

If the determinant formed by the elements of the matrix A is equal to zero, then the matrix is.

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Skew symmetric

Singular

Symmetric

Non singular

In Vann diagram the universal set is represented by

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Points within a rectangle

Points within a circle

Both a and b

None of these

Which method is used for finding inverse of a matrix.

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Gauss elimination method

Henrich standard method

Co factor method

Both a and c

The determinant of a matrix and that of its transpose are

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Equal

Zero

One

Negatively related

The set of all elements belonging to A but not to B is.

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B - A

A - B

A'

B'

A set containing only one element is termed as

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Unit set

Singleton set

Both a and b

None of these

A set containing all the elements of the universal set except those of set A is called.

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Complement of set A

Complement of universal set

Union of A and universals set

Universal set itself

For any square matrix A of order 'n' a +A is.

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Skew symmetric

Non skew symmetric

Symmetric

Non symmetric

"Null set is proper subset of all the non nul sets" this statement is.

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Always true

sometimes true

Never true

True subject to some conditions

The slope of a horizontal line is.

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One

Zero

Three

two

A square matrix a of order 'n' is called a diagonal matrix if its non diagonal elements are.

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zero

Non zero

One

None of the above

If matrix A is matrix of order n x m and B is another matrix of order m x n, then BA will be the matrix of order.

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n x m

m x n

n x n

m x m

An equation in which all variables are raised to the first power is known as.

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Linear equation

Non linear equation

Quadratic equation

Polynomial of degree two

a x2 + bx + c = 0

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Linear equation

Quadratic equation

Polynomial of degree five

None of these

If every elements of a raw or column of a square matrix A is zero, then the value of the determinant .

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Equal

Zero

One

Negative related

If all the elements of a matrix of any order are zero, it is called.

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Identity matrix

Null matrix

Zero matrix

Both b and c

If every element of a raw of column of a square matrix A is zero, then the value of the determinant. is.

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Equal

One

zero

Not equal

Union of A with B is same as union of B with A, that is AUB = BUA is termed as

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Associative law of union

Cumulative law of union

Reflective law

All the above

If A and B are symmetric matrix, then AB- BA is.

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Symmetric

Skew symmetric matrix

Idempotent matrix

Orthogonal matrix

The signed minor of the matrass A is called.

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Adjoin

Co factor

Minor

Rank

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