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. Cho ⃗u, ⃗v, ⃗w là các véctơ đôi một không cùng phương. Chứng minh rằng ⃗u ∧ ⃗v = ⃗v ∧ ⃗w = ⃗w ∧ ⃗u khi và chỉ khi ⃗u + ⃗v + ⃗w = ⃗0.
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. Cho ⃗u, ⃗v, ⃗w là các véctơ đôi một không cùng phương. Chứng minh rằng

⃗u ∧ ⃗v = ⃗v ∧ ⃗w = ⃗w ∧ ⃗u khi và chỉ khi ⃗u + ⃗v + ⃗w = ⃗0.

User Kuffel
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I do not know tbh but i need points
User Osos
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