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4.1 Intro to Matrices

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Chapter 4 Test Review 4.1 Intro to Matrices 4.2 Operations with Matrices 4.3 Multiplying Matrices 4.5 Determinants 4.7 Inverse & Identity Matrices – PowerPoint PPT presentation

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Title: 4.1 Intro to Matrices


1
Chapter 4 Test Review
  • 4.1 Intro to Matrices
  • 4.2 Operations with Matrices
  • 4.3 Multiplying Matrices
  • 4.5 Determinants
  • 4.7 Inverse Identity Matrices
  • 4.8 Using Matrices to Solve Systems of Equations

2
Q1 Simplify the expression.
3
Q2 Multiply the Matrices
4
Q3 Evaluate the __________
Determinant
5
The ____ of a matrix tell how many rows and
columns are in the matrix.
  • A. Determinant
  • B. Dilation
  • C. Dimensions
  • D. Dementia

6
Q4 Evaluate the Determinant
7
Which matrices can I multiply?
  • A. (2x3) (2x3)
  • B. (3x1) (2x3)
  • C. (1x4) (2x4)
  • D. (1x5) (5x7)

8
Q5 Find A-1
9
Q6 Are the matrices inverses? Explain.
and
No, because when you multiply AB and BA you dont
get the identity matrix (I).
10
We NEVER _______ matrices.
  • A. Add
  • B. Subtract
  • C. Multiply
  • D. Divide

11
Q7 Multiply the matrices.
12
If two matrices are equal, then their __________
elements are equal.
  • A. Corresponding
  • B. Opposite
  • C. Adjacent
  • D. Consecutive

13
Q9 Solve.
14
Q10 Write the system of equations for
15
What is the difference between the two
expressions? and
  • B. The first is a matrix, the second is a
    Cramer box.
  • D. The first is missing a number, the second is
    a determinant.
  • A. Youre crazy! There is no difference.
  • C. The first is a matrix, the second is a
    determinant.

16
Q12 Multiply the Matrices.
17
Q13 Find the dimensions of the product
18
Q14 Write the matrix equation for
19
The inverse of is
  • A.
  • C.
  • B.
  • D.
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