Question # 1

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ab - cd = 0

ac - bd = 0

ad - bc = 1

ad - bc = 0

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1

-1

-6

6

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scalar matrix

diagonalmatrix

triangularmatrix

none of these

If any two rows of a square matrix are interchanged, the determinant of the resulting matrix:

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is zero

is multiplicative inverse of the determinant of the original matrix

is additive inverse of the determinant the original matrix

none of these

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scalarmatrix

diagonalmatrix

lower triangularmatrix

uppertriangularmatrix

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scalar matrix

diagonalmatrix

lower triangularmatrix

upper triangularmatrix

If A = [aij] and B = [bij] are two matrices of same order r × s, then order of A - B is:

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r - s

r × s

r + s

none of these

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zero

non-singular

singular

none of these

If A is a square matrix order 3 × 3 the |kA| equals:

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k |A|

k²|A|

k³ |A|

k⁴ |A|

If A is a square matrix, then:

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|A^t| = A

|A^t| = -A

|A^t| = |A|

A^t= A

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9

-9

-6

none

If A and B are two matrices, then:

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A B = O

AB = BA

AB = I

AB may not be defined

If A = [a_ij], B = [b_ij] and AB = 0 then:

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A = 0

B = 0

either A = 0 or B = 0

A & B not necessarily zero

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11th Class FA Mathematics Chapter 3 Online Test MCQs With Answers

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