This post’s question reinforces the previous question in this series, which asks the reader to articulate why division by a vector is undefined in Gibbsian vector analysis. Here’s the question:

**Solve the following vector equation for a:**

Don’t be deceived. It’s not as straightforward as it looks. I would really love hearing from colleagues who give this problem to their students. I predict most (students) will try to divide both sides by a vector to get the answer.

Go!