The derivative of $u^\top N\, x$ with respect to $u$

Question

How do I find the following derivative:

$$ \frac{\partial}{\partial u}(u^\top N\, x) $$

Where $u$ and $x$ are vectors of variables and $N$ is a matrix?

Answer 1

I went through and broke the matrices and vectors into components and did the derivation.

I found that it equals $N x$