# Coursera: Machine Learning (Week 1) Quiz - Linear Algebra | Andrew NG

# ▸ Linear Algebra :

- Let u and v be 3-dimensional vectors, where specifically

and

what is ?

(**Hint**: is a 1x3 dimensional matrix, and v can also be seen as a 3x1 matrix. The answer you want can be obtained by taking the matrix product of and .) Do not add brackets to your answer.

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- Let A and B be 3x3 (square) matrices. Which of the following must necessarily hold true? Check all that apply.

- Let A and B be 3x3 (square) matrices. Which of the following must necessarily hold true? Check all that apply.

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