nguyenkhanhhuyen1252 nguyenkhanhhuyen1252
  • 19-10-2022
  • Mathematics
contestada

. 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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