vault backup: 2025-11-03 14:20:29

This commit is contained in:
2025-11-03 14:20:29 +01:00
parent 289f7fa403
commit 8e3b175d5d
9 changed files with 18749 additions and 20 deletions

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@@ -1,4 +1,5 @@
[
"obsidian-git",
"obsidian-style-settings"
"obsidian-style-settings",
"obsidian-tikzjax"
]

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.obsidian/plugins/obsidian-tikzjax/main.js vendored Normal file

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@@ -0,0 +1,10 @@
{
"id": "obsidian-tikzjax",
"name": "TikZJax",
"version": "0.5.2",
"minAppVersion": "0.12.0",
"description": "Render LaTeX and TikZ diagrams in your notes",
"author": "artisticat",
"authorUrl": "https://github.com/artisticat1",
"isDesktopOnly": false
}

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@@ -24,20 +24,6 @@
{
"id": "66704e0159322e3f",
"type": "leaf",
"state": {
"type": "markdown",
"state": {
"file": "Grafer.md",
"mode": "source",
"source": false
},
"icon": "lucide-file",
"title": "Grafer"
}
},
{
"id": "d6a3070519ac0599",
"type": "leaf",
"state": {
"type": "markdown",
"state": {
@@ -50,7 +36,7 @@
}
}
],
"currentTab": 2
"currentTab": 1
}
],
"direction": "vertical"
@@ -107,8 +93,7 @@
}
],
"direction": "horizontal",
"width": 300,
"collapsed": true
"width": 300
},
"right": {
"id": "b700e0cd0f882a5c",
@@ -210,10 +195,13 @@
"obsidian-git:Open Git source control": false
}
},
"active": "d6a3070519ac0599",
"active": "66704e0159322e3f",
"lastOpenFiles": [
"g2.png",
"Grafer.md",
"g1.png",
"Funktioner Forts.md",
"f_inverse.png",
"Funktioner.md",
"Untitled.canvas"
]

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@@ -8,8 +8,31 @@
- Strängt växande: $x_1<x_2\Rightarrow{f(x_1)}<f(x_2)$
- Avtagande: $x_1<x_2\Rightarrow{f(x_1)}\geq{f(x_2)}$
- Avtagande: $x_1<x_2\Rightarrow{f(x_1)}>f(x_2)$
- *(Strängt) Monoton funktion är (Strängt) växande eller (Strängt) avtagande*
- Jämna, Udda funktioner
- Jämna: $f(-x)=f(x)$
- Ex: $|x|,\;x^2,\;\cos{x}$
- $$\begin{align*}f\text{ är udda }, O\in{D_f}\\f(-x)=-f(x)\forall{x}\in{D_f}\\f(-o)=-f(o)\\\Leftrightarrow{f(o)=-f(o)}\Leftrightarrow{2f(o)=0}\\\Leftrightarrow f(o)=\frac{o}{2}=O\end{align*}$$
- Udda: $f(-x)=-f(x)$
- Ex: $x,\;x^3,\;\sin{x}$
- Ex: $x,\;x^3,\;\sin{x}$
- Sammansatta funktion
- $g\circ{f(x)}=g(f(x))$
- **Egenskaper**:
- $V_{g\circ{f}}\subseteq{V_g}$
- $V_{f}\subseteq{D_g}$
- Ex: $$\begin{align*}f(x)=\sqrt{x}\text{ and }g(x)=(x+5)^2\\f\circ{g}(x)=f(g(x))=f((x+5)^2)=\sqrt{(x+5)^2}=|x+5|\\g\circ{f}(x)=g(f(x))=g(\sqrt{x})=(\sqrt{x}+5)^2\\\text{I allmänhet }f\circ{g(x)}\neq{g\circ{f(x)}}\end{align*}$$
- Inverse
- **Def**: *En funktion $g$ är inverse till funktionen $f$ om $g\circ{f(x)}=x$ och $f\circ{g(x)}=x$ för varje $x\in{D_f}$*
- ![[f_inverse.png]]
- **OPS**: $f^{-1}(x)\neq{(f(x))^{-1}}$
- Betekning: $f^{-1}$ är inverse till $f$
- Graf till inversen $f^{-1}$ är spegling av grafen till f i linjen $y=x$
- 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)}$$$\begin{align}f\\x_1\neq{x_2}\Rightarrow{f(x_1)}\neq{f(x_2)}\end{align}$$
- $f$ är stängt monoton $\Rightarrow\;x$ är injektiv (inverterbar) på $D_f$
- $f$ är inverterbar $\Rightarrow\;D_{f-1}=V_f$ och $V_{f-1}=D_f$
- Ex:
- $f(x)\left\{\begin{align}-x+5,\;0\leq{x}\leq2\\x-4,\;2\leq{x}<4\end{align}\right.$
- ![[g1.png]]
- $f(x)=x^2,\;x\in[0,1]$ $D_f=[0,1]$
- ![[g2.png]]
- $$\begin{align}f(x)=3x+5\\g(x)=\frac{x-5}{3}\end{align}$$

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