1 |
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- A. 40
- B. -40
- C. 26
- D. -26
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2 |
If A and B are two matrices, then: |
- A. A B = O
- B. AB = BA
- C. AB = I
- D. AB may not be defined
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3 |
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4 |
If AB = BA = I, then A and B are: |
- A. equal to each other
- B. multiplicative inverse of each other
- C. additive inverse of each other
- D. both singular
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5 |
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- A. 3×3
- B. 3×2
- C. 2×1
- D. 2×3
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6 |
If each element of a 3 × 3 matrix A is multiplied by 3, then the determinant of the resulting matrix is: |
- A. |A|<sup>3</sup>
- B. 27|A|
- C. 3|A|
- D. 9|A|
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7 |
Two matrices X and Y are equal if and only if: |
- A. X and Y are of same order
- B. Their corresponding elements are equal
- C. Both a and b
- D. None of these
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8 |
If A is a matrix of order m × n and B is a matrix of order n × p then the order of AB is: |
- A. p×m
- B. p×n
- C. n×p
- D. m×p
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9 |
If A = [a<sub>ij</sub>], B = [b<sub>ij</sub>] and AB = 0 then: |
- A. A = 0
- B. B = 0
- C. either A = 0 or B = 0
- D. A & B not necessarily zero
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10 |
If A is a matrix of order m × n, then the number of elements in each row of A is: |
- A. m
- B. n
- C. m + n
- D. m - n
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