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Question summary: Considera les rectes d'equacions: [begin mathsize 12px style bold r bold space bold identical to bold space bold # bold italic e bold 11 bold s bold space bold identical to bold space bold # bold italic e bold 21 bold space end style] A) CALCULA EL PRODUCTE DELS SEUS PENDENTS b) Esbrina si són perpendiculars: S per si, N per no.
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Question state: todo