vault backup: 2025-11-03 14:20:29
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.obsidian/community-plugins.json
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3
.obsidian/community-plugins.json
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[
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"obsidian-git",
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"obsidian-style-settings"
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"obsidian-style-settings",
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"obsidian-tikzjax"
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]
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.obsidian/plugins/obsidian-tikzjax/main.js
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.obsidian/plugins/obsidian-tikzjax/main.js
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.obsidian/plugins/obsidian-tikzjax/manifest.json
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.obsidian/plugins/obsidian-tikzjax/manifest.json
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{
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"id": "obsidian-tikzjax",
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"name": "TikZJax",
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"version": "0.5.2",
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"minAppVersion": "0.12.0",
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"description": "Render LaTeX and TikZ diagrams in your notes",
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"author": "artisticat",
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"authorUrl": "https://github.com/artisticat1",
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"isDesktopOnly": false
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}
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.obsidian/plugins/obsidian-tikzjax/styles.css
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.obsidian/plugins/obsidian-tikzjax/styles.css
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.obsidian/workspace.json
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.obsidian/workspace.json
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@@ -24,20 +24,6 @@
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{
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"id": "66704e0159322e3f",
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"type": "leaf",
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"state": {
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"type": "markdown",
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"state": {
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"file": "Grafer.md",
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"mode": "source",
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"source": false
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},
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"icon": "lucide-file",
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"title": "Grafer"
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}
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},
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{
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"id": "d6a3070519ac0599",
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"type": "leaf",
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"state": {
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"type": "markdown",
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"state": {
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@@ -50,7 +36,7 @@
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}
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}
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],
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"currentTab": 2
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"currentTab": 1
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}
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],
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"direction": "vertical"
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@@ -107,8 +93,7 @@
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}
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],
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"direction": "horizontal",
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"width": 300,
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"collapsed": true
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"width": 300
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},
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"right": {
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"id": "b700e0cd0f882a5c",
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@@ -210,10 +195,13 @@
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"obsidian-git:Open Git source control": false
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}
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},
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"active": "d6a3070519ac0599",
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"active": "66704e0159322e3f",
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"lastOpenFiles": [
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"g2.png",
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"Grafer.md",
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"g1.png",
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"Funktioner Forts.md",
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"f_inverse.png",
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"Funktioner.md",
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"Untitled.canvas"
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]
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@@ -8,8 +8,31 @@
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- Strängt växande: $x_1<x_2\Rightarrow{f(x_1)}<f(x_2)$
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- Avtagande: $x_1<x_2\Rightarrow{f(x_1)}\geq{f(x_2)}$
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- Avtagande: $x_1<x_2\Rightarrow{f(x_1)}>f(x_2)$
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- *(Strängt) Monoton funktion är (Strängt) växande eller (Strängt) avtagande*
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- Jämna, Udda funktioner
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- Jämna: $f(-x)=f(x)$
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- Ex: $|x|,\;x^2,\;\cos{x}$
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- $$\begin{align*}f\text{ är udda }, O\in{D_f}\\f(-x)=-f(x)\forall{x}\in{D_f}\\f(-o)=-f(o)\\\Leftrightarrow{f(o)=-f(o)}\Leftrightarrow{2f(o)=0}\\\Leftrightarrow f(o)=\frac{o}{2}=O\end{align*}$$
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- Udda: $f(-x)=-f(x)$
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- Ex: $x,\;x^3,\;\sin{x}$
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- Ex: $x,\;x^3,\;\sin{x}$
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- Sammansatta funktion
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- $g\circ{f(x)}=g(f(x))$
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- **Egenskaper**:
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- $V_{g\circ{f}}\subseteq{V_g}$
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- $V_{f}\subseteq{D_g}$
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- Ex: $$\begin{align*}f(x)=\sqrt{x}\text{ and }g(x)=(x+5)^2\\f\circ{g}(x)=f(g(x))=f((x+5)^2)=\sqrt{(x+5)^2}=|x+5|\\g\circ{f}(x)=g(f(x))=g(\sqrt{x})=(\sqrt{x}+5)^2\\\text{I allmänhet }f\circ{g(x)}\neq{g\circ{f(x)}}\end{align*}$$
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- Inverse
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- **Def**: *En funktion $g$ är inverse till funktionen $f$ om $g\circ{f(x)}=x$ och $f\circ{g(x)}=x$ för varje $x\in{D_f}$*
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- ![[f_inverse.png]]
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- **OPS**: $f^{-1}(x)\neq{(f(x))^{-1}}$
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- Betekning: $f^{-1}$ är inverse till $f$
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- Graf till inversen $f^{-1}$ är spegling av grafen till f i linjen $y=x$
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- Injektiv funktion: $\forall{x_1,x_2}\in{D_f},\;x_1\neq{f(x_2}\rightarrow{x_1}\neq{f(x_2)}=\frac{1}{f(x)}$$$\begin{align}f\\x_1\neq{x_2}\Rightarrow{f(x_1)}\neq{f(x_2)}\end{align}$$
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- $f$ är stängt monoton $\Rightarrow\;x$ är injektiv (inverterbar) på $D_f$
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- $f$ är inverterbar $\Rightarrow\;D_{f-1}=V_f$ och $V_{f-1}=D_f$
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- Ex:
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- $f(x)\left\{\begin{align}-x+5,\;0\leq{x}\leq2\\x-4,\;2\leq{x}<4\end{align}\right.$
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- ![[g1.png]]
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- $f(x)=x^2,\;x\in[0,1]$ $D_f=[0,1]$
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- ![[g2.png]]
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- $$\begin{align}f(x)=3x+5\\g(x)=\frac{x-5}{3}\end{align}$$
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f_inverse.png
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f_inverse.png
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