IDENTITY AND INVERSE MATRICES

Which matrix is an identity matrix

• A

• B

• C

• D

Tags

CCSS.HSN.VM.C.10

That is the matrix M.Given that the determinant of M is y.Find Y

• 1/2

• 3

• 2

• Y

Find the values of M and N

• M=1/2 N=3

• M=1/6 N=3

• M=1/2 N=-3

• M=1/6 N=3

Find the values of M and N

• N = 3 M=1/2

• N = -3 M=1/2

• N=2 M=1/3

• N=-2 M=-1/3

The order of this matrix is?

• 2 x 3

• 2 x 1

• 2 x 2

• Tatahu

How many rows are in a 7 x 3 matrix?

• 7
• 3
• 21
• 10

Tags

CCSS.3.OA.A.3

What is the name of each entry of a matrix?

• Row
• Element
• Dimension
• Rectangle

Find A-B

• -3     1
  7     -1
• 1     0
  1     -4
• -4       0
  6     -1
• not possible because rows do not match columns

Tags

CCSS.HSA.REI.C.6

CCSS.HSA.REI.C.8

What is the determinant of this matrix?

• -2

• 2

• 10

• 24

Tags

CCSS.HSN.VM.C.12

What is A^-1?

• 
• 
• 
• 

Tags

CCSS.HSA.REI.C.9