Question # 1

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3×3

3×2

2×1

2×3

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25

20

40

2a + 2b + 2c

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5

-5

-4

4

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

If each element of a 3 × 3 matrix A is multiplied by 3, then the determinant of the resulting matrix is:

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|A|³

27|A|

3|A|

9|A|

Minors and co-factors of the elements in a determinant are equal in magnitude but they may differ in:

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order

position

sign

symmetry

A matrix of order m×1 is called:

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row matrix

column matrix

identity matrix

scalar matrix

If A is a matrix of order m × n, then the number of elements in each row of A is:

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m

n

m + n

m - n

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1

-1

-6

6

If A is a square matrix, then:

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|A^t| = A

|A^t| = -A

|A^t| = |A|

A^t= A

The trivial solution of the homogeneous linear equations is:

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(1, 0, 0)

(0, 1, 0)

(0, 0, 1)

(0, 0, 0)

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

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