$$\sqrt{a^2+b^2}$$
$$x = a_{1}^n + a_{2}^n + a_{3}^n$$ $\_{i=1}^{n}a_{i}$ $\sqrt{a^2+b^2}$ $\sqrt{a^2+b^2}$ $x = a_{1}^n + a_{2}^n + a_{3}^n$ $\sum_{i=1}^{n}a_{i}$ $\prod_{i=1}^{n}a_{i}$ $\int^{b}_{a}F'(x)dx= F(x)|^{2}$ $\therefore a_{i}=0$ $\because $
$$\begin{align}\notag \dot{x}&=\mathbf{A}x+\mathbf{B}u\\\\ y&=\begin{bmatrix}1&0\\0&1\end{bmatrix}x+\begin{bmatrix}1&0\\\\0&1\end{bmatrix}u\label{name}\end{align} $$