Matrices

• 2

• 7

• 4

• -3

What are the dimensions of this matrix?

• 2 x 3
• 3 x 2
• 6 x 1
• 1 x 6

What is the size of the matrix obtained from this operation?

• 3 x 2

• 2 x 3

• 3 x 3

• The operation cannot be performed

Given the above matrix subtraction, which of the following is TRUE?

• w = 13 and y = 7

• x = -4 and y = 11

• x = 4 and z = 23

• y = 7, z = 17

Find the product of the two matrices.

• Undefined

• -3 16

  17 12

  8 -10

• 3 12

  -15 -8

  -1 -3

• -9 8

  5 -8

  -1 -6

find: B*A

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What must be true in order to ADD two matrices?

• They must be square matrices.

• The dimensions must be equal.

• The diagonal of the matrices cannot be 0.

• The column of the 1st matrix must be equal to the row of the 2nd matrix.

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

• A^-1B^-1

• AB

• B^-1A^-1

• none of these

What is P^T (transpose of P)?

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Find the inverse of the matrix below:

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