Home
Class 12
MATHS
If A=[(1,3),(2,-1)] then AdjA=...

If `A=[(1,3),(2,-1)]` then AdjA=

A

`[(-1,-3),(-2,1)]`

B

`[(1,-3),(-2,1)]`

C

`[(1,-3),(2,1)]`

D

`[(-1,-3),(-2,-1)]`

Text Solution

Verified by Experts

The correct Answer is:
A
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • MATRICES

    DIPTI PUBLICATION ( AP EAMET)|Exercise EXERCISE 1D MCQ (LINEAR EQUATIONS)|53 Videos

  • MATRICES

    DIPTI PUBLICATION ( AP EAMET)|Exercise EXERCISE 2 MCQ (SPECIAL TYPES QUESTIONS) SET -1|9 Videos

  • MATRICES

    DIPTI PUBLICATION ( AP EAMET)|Exercise EXERCISE 1B MCQ (DETERMINANTS)|189 Videos

  • MATHEMATICAL REASONING [APPENDIX - 4]

    DIPTI PUBLICATION ( AP EAMET)|Exercise Exercise|150 Videos

  • MEASURES OF DISPERSION

    DIPTI PUBLICATION ( AP EAMET)|Exercise EXERCISE-2 ( SET -4)|2 Videos

Similar Questions

Explore conceptually related problems

If A=[(1,2,3),(2,3,1)] and B=[(3,-1,3),(-1,0,2)] , then find 2A-B .

If A = [(1,2,3),(3,2,1)] and B = [(3,2,1),(1,2,3)] , find 3B - 2A .

Knowledge Check

  • If A=[(1,3),(2,1)] then the determinant of A^(2)-2A is

    A
    5
    B
    25
    C
    -5
    D
    -25

  • If A=[(1,1,1),(1,2,-3),(2,-1,3)] then AdjA=

    A
    `[(3,-4,-5),(-9,1,-4),(-5,-3,1)]`
    B
    `[(3,4,5),(-9,1,-4),(5,-3,1)]`
    C
    `[(3,-4,-5),(-9,1,4),(-5,3,1)]`
    D
    `[(3,-9,-5),(-4,1,3),(-5,4,1)]`

  • I: If A=[(1,2),(3,4)] then A^(-1)=[(4,-2),(-3,1)] II: If A=[(3,4),(2,1)] then A^(-1)=1/5[(-1,4),(2,-3)]

    A
    only I is true
    B
    only Ii is true
    C
    both I and II are true
    D
    neither I nor II true

    • Similar Questions

    Explore conceptually related problems

    If A=[(2,1,1),(1,3,1),(1,2,1)] then A^(T)=

    If A=[(-1,-2,-2),(2,1,-2),(2,-2,1)] then adjA=

    If A=[(0,1,-1),(2,1,3),(3,2,1)] then [A(adjA)A^(-1)]A=

    If A=[(5a,-b),(3,2)] and A. adjA = A.A^(T) then 5a+b is equal to

    If A=[(2,3,1),(0,-1,5)],B=[(1,2,-1),(0,-1,3)] then 2A-3B=

    Home
    Profile