Home
Class 12
MATHS
If I is unit matrix of order n, then 3I ...

If I is unit matrix of order n, then 3I will be

A

a unit matrix

B

a scalar matrix

C

a triangular matrix

D

a zero matrix

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • LINEAR PROGRAMMING

    NIKITA PUBLICATION|Exercise MCQs|101 Videos

  • MHT-CET 2017

    NIKITA PUBLICATION|Exercise MCQ|50 Videos

Similar Questions

Explore conceptually related problems

If I is a unit matrix of order 10, then the determinant of I is equal to

If I is a unit matrix of order 10, then the determinant of I is equal to

If A is a unit matrix of order n, then A(adjA) is

A=([1,0,0],[0,1,1],[0,-2,4])" and if "A^(-1)=(1)/(6)[alpha A^(2)+beta A+gamma I]" when "I" is unit matrix of order "3" then the value of "alpha+beta+gamma" is "

If k is a scalar and I is unit matrix of order 3, then adj(kI)=

If I_(3) is identity matrix of order 3, then I_(3)^(-1)=

If A=[(2,-1),(-1,2)] and i is the unit matrix of order 2, then A^2 is equal to (A) 4A-3I (B) 3A-4I (C) A-I (D) A+I

If I_n is the identity matrix of order n then (I_n)^-1 (A) does not exist (B) =0 (C) =I_n (D) =nI_n

NIKITA PUBLICATION-MATRICES-MULTIPLE CHOICE QUESTIONS
  1. If A is square matrix, A+A^(T) is symmetric matrix, then A-A^(T)=

    Text Solution

    |

  2. If A^(T) is a skew-symmetric matrix and n is a positive integer, then ...

    Text Solution

    |

  3. If I is unit matrix of order n, then 3I will be

    Text Solution

    |

  4. If A is a square matrix of order n then |kA|=

    Text Solution

    |

  5. If A and B are square matrices of same order, then

    Text Solution

    |

  6. If two matrices A and B are of order ptimesq and r timess respectively...

    Text Solution

    |

  7. Matrix A is of order mtimesn, matrix B is of order ptimesq such that A...

    Text Solution

    |

  8. If A and B are two matrices such that A+B and AB are both defined, the...

    Text Solution

    |

  9. If A is a mtimesn matrix and B is a matrix such that both AB and BA ar...

    Text Solution

    |

  10. Which one of the following is not true?

    Text Solution

    |

  11. Which is true about matrix multiplication?

    Text Solution

    |

  12. The matrix product AB=0, then

    Text Solution

    |

  13. Assuming that the sums and products given below are defined, which of ...

    Text Solution

    |

  14. If A, B are square matrices of order 3, A is non-singular and AB=0, th...

    Text Solution

    |

  15. If A andB are square matrices of order 2, then (A+B)^(2)=

    Text Solution

    |

  16. If A and B are square matrices of order ntimesn, then (A-B)^(2)=

    Text Solution

    |

  17. If A, B are two matrices and (A+B)(A-B)=A^(2)-B^(2), then

    Text Solution

    |

  18. Which of the following is incorrect?

    Text Solution

    |

  19. If A^(T), B^(T) are transpose of the square matrices A, B respectively...

    Text Solution

    |

  20. Which of the following relations is incorrect?

    Text Solution

    |