Linear Algebra Checkpoint

1. The dot product of [1, 2, 3] and [4, 5, 6] is:

32 15 21 27

2. Matrix multiplication AB requires:

A's columns = B's rows A's rows = B's rows Same dimensions Square matrices only

3. The transpose of a row vector is:

A column vector A scalar A matrix Unchanged

4. What is the L2 norm (magnitude) of vector [3, 4]?

5. An identity matrix multiplied by any matrix A gives:

A I 0 A transpose