J
jris1
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
E moi vao hoc! co bai kho hieu mong cac pro giup
cho 4 vecto: [TEX]\vec a \[/TEX]+[TEX]\vec b \[/TEX]+[TEX]\vec c \[/TEX]+[TEX]\vec d \[/TEX]=[TEX]\vec 0 \[/TEX], trong do 4 vecto co do dai = nhau.
CMR: trong do co 2 vecto co tong = 0.
Mong giai giup. bai de ma. Nhanh nha mai e di hoc. ^^
:-SS:-SS:-SS:-SS:-SS:-SS:-SS:-SS:-SS:-SS:-SS:-SS:-SS
cho 4 vecto: [TEX]\vec a \[/TEX]+[TEX]\vec b \[/TEX]+[TEX]\vec c \[/TEX]+[TEX]\vec d \[/TEX]=[TEX]\vec 0 \[/TEX], trong do 4 vecto co do dai = nhau.
CMR: trong do co 2 vecto co tong = 0.
Mong giai giup. bai de ma. Nhanh nha mai e di hoc. ^^
:-SS:-SS:-SS:-SS:-SS:-SS:-SS:-SS:-SS:-SS:-SS:-SS:-SS
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