Home
Class 12
MATHS
Multiplicative inverse of the matrix [[2...

Multiplicative inverse of the matrix `[[2,1],[7,4]]` is (i) `[[4,-1],[-7,-2]]` (ii) `[[-4,-1],[7,-2]]` (iii) `[[4,-1],[7,2]]` (iv) `[[4,-1],[-7,2]]`

A

`{:[(4,-1),(-7,-2)]:}`

B

`{:[(-4,-1),(7,-2)]:}`

C

`{:[(4,-1),(7,2)]:}`

D

`{:[(4,-1),(-7,2)]:}`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • MATRICES

    AAKASH INSTITUTE|Exercise Assignment (Section - B) Objective Type Questions (One option is correct)|13 Videos

  • MATRICES

    AAKASH INSTITUTE|Exercise Assignment (Section - C) Objective Type Questions (More than one options are correct)|7 Videos

  • MATRICES

    AAKASH INSTITUTE|Exercise Try yourself|12 Videos

  • MATHEMATICAL REASONING

    AAKASH INSTITUTE|Exercise Assignment (SECTION-D) (Assertion-Reason Type Questions)|15 Videos

  • PERMUTATIONS AND COMBINATIONS

    AAKASH INSTITUTE|Exercise Assignment Section-J (Aakash Challengers Questions)|7 Videos

Similar Questions

Explore conceptually related problems

The inverse of matrix [[2, 1], [7, 4]] is

Multiple inverse of the matrix [(2,1),(7,4)] is (A) [(4,-1),(7,-2)] (B) [(-4,-1),(7,-2)] (C) [(4,-1),(7,2)] (D) [(4,-1),(-7,-2)]

Find the inverse of the matrix: [[1,2,-1-4,-7,4-4,-9,5]]

The inverse of the matrix [[1, 2, 3], [1, 1, 5], [2, 4, 7]] is

1.Find the rank of the matrix [[1,-2,3,4],[-2,4,-1,-3],[-1,2,7,6]]

The inverse of [(1,2,4),(3,-19,7),(2,4,8)] is

The inverse of the matrix [(2,3),(-4,7)] is (A) [(-2,-3),(4,-7)] (B) 1/26 [(7,-3),(4,2)] (C) [(7,4),(-3,2)] (D) [(7,-3),(4,2)]

(b) Find the rank of the matrix A= [[1,2,1,2],[1,3,2,2],[2,4,3,4],[3,7,4,6]]

4.Find the rank of the matrix [[3,4,1,2],[3,2,1,4],[7,6,2,5]]

AAKASH INSTITUTE-MATRICES-Assignment (Section - A) Objective Type Questions (One option is correct)
  1. Let A be a square matrix. Then which of the following is not a symmetr...

    Text Solution

    |

  2. Each diagonal elemetn of a skew symmetric matrix is (A) zero (B) negat...

    Text Solution

    |

  3. If A={:[(1,0),(1,1)]:},"then "A^(2008) is equal to

    Text Solution

    |

  4. If A=[ x y z],B=[(a,h,g),(h,b,f),(g ,f,c)],C=[alpha beta gamma]^T th...

    Text Solution

    |

  5. if for a matrix A, A^2+I=O, where I is the identity matrix, then A equ...

    Text Solution

    |

  6. If A and B are two matrices such that AB=B and BA=A, then

    Text Solution

    |

  7. If {:A+B=[(1,0),(1,1)]andA-2B=[(-1,1),(0,-1)]:}," then "A=

    Text Solution

    |

  8. {:[(7,1,2),(9,2,1)]:}{:[(3),(4),(5)]:}+2{:[(4),(2)]:} is equal to

    Text Solution

    |

  9. If f(x)=x^(2)+4x-5andA={:[(1,2),(4,-3)]:}, then f(A) is equal to

    Text Solution

    |

  10. Multiplicative inverse of the matrix [[2,1],[7,4]] is (i) [[4,-1],[-7...

    Text Solution

    |

  11. If the matrix A is such that ({:(1,3),(0,1):})A=({:(1,1),(0,-1):}), t...

    Text Solution

    |

  12. If A is a squqre matrix such that A^(2)=l, then A^(-1) is equal to

    Text Solution

    |

  13. If X+{:[(2,1),(6,1)]:}={:[(1,1),(0,1)]:} then 'X' is equal to

    Text Solution

    |

  14. If A={:[(1,2,3),(-2,5,7)]:}and2A-3B={:[(4,5,-9),(1,2,3)]:} then B is e...

    Text Solution

    |

  15. If {:[(x,1),(-1,-y)]:}+{:[(y,1),(3,x)]:}={:[(1,2),(2,1)]:}, then

    Text Solution

    |

  16. Let A={:[(2,3,5),(1,0,2),(3,4,5)]:}andA+B-4I=0, then B is equal to

    Text Solution

    |

  17. If A={:[(1,2),(-1,8),(4,9)]:}andX+A=0, then X is equal to

    Text Solution

    |

  18. Show that costheta.[{:(costheta,sintheta),(-sintheta,costheta):}]+sint...

    Text Solution

    |

  19. If {:[(x+y,y-z),(z-2x,y-x)]:}={:[(3,-1),(1,1)]:}, then

    Text Solution

    |

  20. If A=[{:(1,-3,2),(2," "0,2):}]" and "B=[{:(2,-1,-1),(1," "0,-1):}], fi...

    Text Solution

    |