Loading [MathJax]/jax/output/CommonHTML/jax.js

CBSE Questions for Class 12 Commerce Maths Matrices Quiz 8 - MCQExams.com

If A is a scalar matrix kI with scalar k0 of order 3, the A1 is:
  • 1k2I
  • 1k3I
  • 1kI
  • kI
If A=[7213] and A+B=[1024], then matrix B=?
  • [1011]
  • [6231]
  • [8217]
  • [8217]
If A=[4263], then A2 is
  • [164369]
  • [84126]
  • [4263]
  • [4263]
If A+B=[2345] and A=[1203], then matrix B is
  • [1142]
  • [1412]
  • [2411]
  • [4211]
If (1221)(xy)=(24), then the values of x and y respectively, are
  • 2,0
  • 0,2
  • 0,2
  • 1,1
If [5x1][213]=(20), then the value of x is
  • 7
  • 7
  • 17
  • 0
If A=[7213] and A+B=[1024], then the matrix B=
  • [1001]
  • [6231]
  • [8217]
  • [8217]
Choose the correct statement related to the matrices A=[1001] and B=[0110]
  • A3=A,B3B
  • A3A,B3=B
  • A3=A,B3=B
  • A3A,B3B
If A=(4263), then A2 is
  • (164369)
  • (84126)
  • (4263)
  • (4263)
(1001)(abcd)=(1001), then the values of a,b,c and d respectively are
  • 1,0,0,1
  • 1,0,0,1
  • 1,0,1,0
  • 1,0,0,0
If (a312)(21)=(50), then the value of a is
  • 8
  • 4
  • 2
  • 11
If A=[123] and B=[123], then A+B is
  • [000]
  • [000]
  • [14]
  • not defined
If matrix A=[1243] such that Ax=I, then x=................
  • 15[1321]
  • 15[4241]
  • 15[3241]
  • 15[1214]
The matrix A=[011101110] is a :
  • Diagonal matrix
  • Symmetric matrix
  • Skew-symmetric matrix
  • Identity matrix
The inverse of a diagonal matrix is a :
  • Symmetric matrix
  • Skew-symmetric matrix
  • Diagonal matrix
  • None of the above
If [3106][3x1]+[2x3]=[89], then the value of x is
  • 38
  • 7
  • 29
  • None of these
Let A=[x+yy2xxy],B=[21] and C=[32]. If AB=C, then A2 is equal to
  • [610426]
  • [105424]
  • [56420]
  • None of these.
If the matrix A is such that [1301]A=[1101], then what is equal to A?
  • [1401]
  • [1401]
  • [1401]
  • [1401]
If A=[111234323] and B=[12161265105], then which of the following is/are correct?
A and B commute.
AB is null matrix.
Select the correct answer using the code given below :
  • 1 only
  • 2 only
  • Both 1 and 2
  • Neither 1 nor 2
If (2341)×(5231)=(1117λ) then what is λ equal to?
  • 7
  • 7
  • 9
  • 9
If A=(1345) then A1 equals
  • 17(A+6I)
  • 17(A6I)
  • 17(6IA)
  • None of these
If [1x1][132051020] [11x]=0, then the values of x are:
  • 1,5
  • 1,5
  • 1,6
  • 1,6
  • 3,3
If A=[2312], then A3+3A24A+1 is equal to
  • [1110]
  • [14511714]
  • [14511714]
  • [1110]
If A=(3193) then (1+2A+3A2+....)1 equals
  • (52187)
  • (51827)
  • (72185)
  • None of these
If [αβγα] to the square is two rowed unit matrix, then α,β,γ should satisfy the relation
  • 1+α2+βγ=0
  • 1α2βγ=0
  • 1α2+βγ=0
  • α2+βγ1=0
If A=[α011] and B=[1051], then value of α for which A2=B, is
  • 1
  • 1
  • 4
  • No real value
If A=[1334] and A2kA5I2=0, then the value of k is
  • 3
  • 5
  • 7
  • 7
If A=[132k] and A24A+10I=A, then k is equal to
  • 0
  • 4
  • 4 and not 1
  • 1 or 4
If A=|5x22x+3x+1| is symmetric, then x=_____
  • 4
  • 5
  • 5
  • 4
If A is a non zero square matrix of order n with det(I+A)0, and A3=0, where I,O are unit and null matrices of order n×n respectively, then (I+A)1=
  • IA+A2
  • I+A+A2
  • I+A2
  • I+A
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Class 12 Commerce Maths Quiz Questions and Answers