Q1 - Alg 2 - Hw #07 (matrix inverse)

The matrix A does not have an inverse. This means the matrix ​ (a)   or the determinant ​ (b)  

• is not a square
• is equal to zero
• is a square
• is non-zero

Dos the following matrices have inverses?

Groups:

(a) Has an inverse

,

(b) Does not have inverse

• 
• 
• 
• 

What is the name of this matrix?

• The inverse matrix

• The identity matrix

• the magnitude matrix

• the determinant matrix

• 1

• 0

• Does not exist

• 

What is the determinant of this matrix?

Mathematical Equivalence

ON

Which of the following matrices does NOT have an inverse?

• 
• 
• 

Tap the 2 letters that swap when creating an inverse.

Tap the 2 letters that change signs when creating an inverse.

Change signs = change positive to negative

• Divide by the determinant

• Find the determinant

• Rearrange the matrix and change signs

• Simply any fractions

What is the derminant for this matrix?