Finding the Inverse Matrix

• Find the determinant

• Rearrange the matrix and change signs

• Divide by the determinant

• Simply any fractions

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

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

______________ matrices are matrices whose product (In both orders) is the identity matrix.

• zero

• square

• identity

• inverse

Determine whether the matrices are multiplicative inverses.

• Yes

• No

• Workout

• Valut-Tech

What is the opposite of a normal matrix to make it able to multiply?

• Identity

• Leslie model

• Inverse

• Scalar

When you multiply a matrix by the inverse matrix, you obtain the...

• Inverse matrix.

• Opposite matrix.

• Identity matrix

• Original matrix.

When you multiply a matrix by the inverse matrix, you obtain the

• inverse matrix.

• transpose matrix.

• Identity matrix

• original matrix.

If A and B are invertible matrix then (AB)^-1 =

• A^-1B^-1

• AB

• B^-1A^-1

• none of these