\documentclass[a4paper,norsk,11pt]{interaktiv}
\usepackage{tcolorbox}
% Importerte pakker
\usepackage[version=3]{mhchem}
\usepackage{float}
\usepackage{marginnote}
\usepackage{chemfig}
\usepackage{amsmath}
\usepackage{bm}
\usepackage{systeme}
\usepackage{hyperref}
\usepackage{amsfonts}
\restylefloat{figure}
\usepackage{ifluatex}
\usepackage{subfigure}
\usepackage{tikz}
\usetikzlibrary{arrows}
\usetikzlibrary{snakes}
\usepackage[parfill,skip=.4cm]{parskip}    		% Activate to begin paragraphs with an empty line rather than an indent
\usepackage{graphicx}
\usepackage[standard-baselineskips]{cmbright}
\usepackage{listings}
\usepackage[normalem]{ulem}
\usepackage{verbatim}

\usepackage{xfakebold}
\newcommand{\fbseries}{\unskip\setBold\aftergroup\unsetBold\aftergroup\ignorespaces}
\makeatletter
\newcommand{\setBoldness}[1]{\def\fake@bold{#1}}
\makeatother

\newcommand{\vek}[1]{\mathbf{#1}}
\newcommand{\vekF}{\vek{F}}
\newcommand{\vekG}{\vek{G}}
\newcommand{\vekn}{\widehat{\vek{N}}}
\newcommand{\vekr}{\vek{r}}


\newcommand{\V}[1]{\mathbf{#1}}
\usepackage{unicode-math}
\usepackage{dirtytalk}
\usepackage{rotate}

\ifluatex
  \usepackage{fontspec}
%  \setmainfont{Calibri}
  \usepackage{unicode-math}
%  \setmathfont{Cambria Math}
\else
  \usepackage[utf8]{inputenc}
\fi

\usepackage[european,americanvoltages,americaninductors,americancurrents]{circuitikz}


\newcommand{\vv}[2]{\begin{bmatrix} #1 \\ #2 \end{bmatrix}}
\newcommand{\vvS}[2]{\left[ \begin{smallmatrix} #1 \\ #2 \end{smallmatrix} \right]}
\newcommand{\vvv}[3]{\begin{bmatrix} #1 \\ #2 \\ #3 \end{bmatrix}}
\newcommand{\vvvv}[4]{\begin{pmatrix} #1 \\ #2 \\ #3 \\ #4 \end{pmatrix}}
\newcommand{\vvvvv}[5]{\begin{bmatrix} #1 \\ #2 \\ #3 \\ #4 \\ #5 \end{bmatrix}}
\newcommand{\vn}[2]{\vvvv{#1_1}{#1_2}{\vdots}{#1_#2}}

\usepackage{url}


\newenvironment{amatrix}[1]{% "augmented matrix"
\begin{array}{*{#1}{c}|c}
}{%
  \end{array}
}
% Underfigurer
\renewcommand{\thesubfigure}{(\arabic{subfigure})}

% Overskrift
\emnekode{TMA4101/4106/4111/4121}
\emnenavn{}




% Nye kommandoer
\newcommand{\dee}{\mathop{}\!{d}}