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Matemática
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Age 18+
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level: Universidade
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คำแนะนำของผู้เขียน
Demonstração da condição de perpendicularidade de duas retas
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Matemática
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Provas e demonstrações
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Age 18+
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level: Universidade
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Portuguese
คำแนะนำของผู้เขียน
Demonstração da condição de perpendicularidade de duas retas