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Matrix Operations and Inverses

Matrix Operations and Inverses

Assessment

Interactive Video

•

Mathematics

•

9th - 12th Grade

•

Practice Problem

•

Hard

•
CCSS
HSA.REI.C.9, HSN.VM.C.7, 8.EE.C.8B

+2

Standards-aligned

Created by

Emma Peterson

FREE Resource

Standards-aligned

CCSS.HSA.REI.C.9
,
CCSS.HSN.VM.C.7
,
CCSS.8.EE.C.8B
CCSS.HSN.VM.C.10
,
CCSS.HSA.REI.C.6
,
This video tutorial demonstrates how to find the inverse of a 3x3 matrix using an augmented matrix approach. It involves setting up a 3x6 matrix with the original matrix on the left and an identity matrix on the right. Through a series of row operations, the left side is transformed into an identity matrix, resulting in the right side becoming the inverse of the original matrix. The tutorial provides step-by-step instructions and calculations to achieve this transformation.

Read more

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of using an augmented matrix in finding the inverse of a 3x3 matrix?

To simplify the matrix multiplication process

To perform row operations to find the inverse

To transform the matrix into a diagonal matrix

To convert the matrix into a 2x2 matrix

Tags

CCSS.HSN.VM.C.7

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in transforming matrix A into an identity matrix?

Multiplying row 2 by 3 and adding to row 3

Adding row 1 to row 2

Subtracting row 3 from row 1

Dividing row 1 by 2

Tags

CCSS.HSN.VM.C.7

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can you obtain a zero in row two, column one?

By dividing row 2 by 2

By adding row 1 to row 2

By subtracting row 3 from row 2

By multiplying row 2 by -4 and adding row 1

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What operation is performed to achieve a zero in row one, column three?

Adding row 3 to row 1

Subtracting row 2 from row 1

Dividing row 3 by 3

Multiplying row 1 by 2

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which operation helps in obtaining a zero in the second column of row three?

Dividing row 2 by 3

Multiplying row 3 by 2

Subtracting row 1 from row 3

Adding row 2 to row 3

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the least common multiple used to replace row 2 in the operations?

7

6

5

4

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the final step to ensure the first element in row one is +1?

Multiply row 1 by -1/2

Add row 2 to row 1

Subtract row 3 from row 1

Divide row 1 by 3

Tags

CCSS.HSA.REI.C.9

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