eduroam-prg-og-1-29-184.net.univ-paris-diderot.fr 2026-3-23:11:26:56

This commit is contained in:
oskar
2026-03-23 11:26:57 +01:00
parent 0ea2a4f7c9
commit c0cdc34e17
5 changed files with 7 additions and 6 deletions

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"repelStrength": 5.263671875,
"linkStrength": 1,
"linkDistance": 30,
"scale": 0.0989427787267463,
"scale": 0.13320413080202398,
"close": true
}

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"prevs"
],
"lock_view": false,
"lock_path": "anneau.md"
"lock_path": "sources/Alan Perlis.md"
},
"tree": {
"collapse": false,
@@ -651,7 +651,7 @@
"alias": false
},
"lock_view": false,
"lock_path": "anneau.md"
"lock_path": "sources/Alan Perlis.md"
}
},
"codeblocks": {

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> $a^{n} - b^{n} = (a-b) \sum\limits_{k=0}^{n-1}a^{k}b^{n-1-k}$
> > [!démonstration]- Démonstration
> > Réécrivons le terme de droite de manière développée :
> > $\begin{align} (a-b)\sum\limits_{k=0}^{n-1}a^{k}b^{n-1-k} &= (a-b)(a^{0}b^{n-1} + a^{1}b^{n-2} + \cdots + a^{n-2}b^{1}+a^{n-1}b^{0}) \\&= \bcancel{\color{darkred}a^{1}b^{n-1}} + \bcancel{\color{chartreuse}a^{2}b^{n-2}}+\bcancel{\color{deepskyblue} a^{3}b^{n-3}} + \cdots + \bcancel{\color{orange} a^{n-1}b^{1}} +a^{n}b^{0} \\ &\quad \,- a^{0}b^{n}-a^{1}b^{n-1}- a^{2}b^{n-2}-\cdots -a^{n-2}b^{2}-a^{n-1}b^{1} \end{align}$
> > $\begin{align} (a-b)\sum\limits_{k=0}^{n-1}a^{k}b^{n-1-k} &= (a-b)(a^{0}b^{n-1} + a^{1}b^{n-2} + \cdots + a^{n-2}b^{1}+a^{n-1}b^{0}) \\&= \bcancel{\color{deepskyblue}a^{1}b^{n-1}} + \bcancel{\color{chartreuse}a^{2}b^{n-2}}+\bcancel{\color{#ffaaff} a^{3}b^{n-3}} + \cdots + \bcancel{\color{orange} a^{n-1}b^{1}} +a^{n}b^{0} \\ &\quad \,- a^{0}b^{n} - \bcancel{\color{deepskyblue}a^{1}b^{n-1}} \bcancel{\color{chartreuse} - a^{2}b^{n-2}}- \cdots \bcancel{\color{#aaaaff}-a^{n-2}b^{2}} \bcancel{\color{orange}-a^{n-1}b^{1}} \\&= a^{n}b^{0} - a^{0}b^{n} \\&= \boxed{a^{n} - b^{n}} \end{align}$
> >
# Exemples

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---
aliases:
aliases:
up:
- "[[morphisme]]"
- "[[anneau]]"
tags:
- s/maths/algèbre
---

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@@ -8,7 +8,7 @@
```breadcrumbs
title: "Sous-notes"
type: tree
collapse: false
collapse: true
show-attributes: [field]
field-groups: [downs]
depth: [0, 1]