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If A=I is 2x2 matrix then det(I+A)=...

If `A=I` is 2x2 matrix then `det(I+A)=`

A

4

B

1

C

2

D

none

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • If A is a 4xx4 matrix and det (AdjA)=-27 then detA=

    A
    `+-2`
    B
    3
    C
    -3
    D
    0

  • If A is a 3xx3 matrix and det(AdjA)=4 then detA=

    A
    `+-2`
    B
    25
    C
    10
    D
    0

  • If A is a 3xx3 matrix and det(3A)=k(detA) then k=

    A
    9
    B
    6
    C
    1
    D
    27

    • Similar Questions

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    If A is a 3xx3 matrix and det A=5 then det (AdjA)=

    If A is a 4xx4 matrix and detA=-2 then det (AdjA)=

    If A!=I is an idempotent matrix, then A is a

    If A is square matrix such that A^(2)=A , then (I+A)^(3)-7A is equal to

    Assertion (A) : The matrix [(cosalpha,sinalpha),(-sinalpha,cosalpha)] is an orthogonal matrix. Reason (R) : If A is an orthogonal matrix then A A^(T)=A^(T)A=I

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