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Update textbook.fr.md

keep-around/cc32f088c819eb0abe820a47f07800c62753b9ba
Claude Meny 5 years ago
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commit
cc32f088c8
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      00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/04.reference-frames-coordinate-systems/textbook.fr.md

2
00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/04.reference-frames-coordinate-systems/textbook.fr.md

@ -258,7 +258,7 @@ $`=\sqrt{(dl_x\;\overrightarrow{e_x}+dl_y\;\overrightarrow{e_y}+dl_z\;\overright
(dl_x\;\overrightarrow{e_x}+dl_y\;\overrightarrow{e_y}+dl_z\;\overrightarrow{e_z})}`$
$`=\left[(dl_x)^2\;(\overrightarrow{e_x}\cdot\overrightarrow{e_x})\right.`$
$`+(dl_y)^2\;(\overrightarrow{e_y}\cdot\overrightarrow{e_y})`$
+(dl_z)^2\;(\overrightarrow{e_z}\cdot\overrightarrow{e_z})}`$
$`+(dl_z)^2\;(\overrightarrow{e_z}\cdot\overrightarrow{e_z})}`$
$`+(2\,dl_x\,dl_y)\,(\overrightarrow{e_x}\cdot\overrightarrow{e_y})`$
$`+(2\,dl_x\,dl_z)\,(\overrightarrow{e_x}\cdot\overrightarrow{e_z})`$
$`\left.+(2\,dl_y\,dl_z)\,(\overrightarrow{e_y}\cdot\overrightarrow{e_z})\right]^{1/2}`$

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