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2022-12-15 12:47:32
a) vecto AB = vecto NM
có vecto AI + vecto IB = vecto NA + vecto AM
<=> vecto AM + vecto MB = vecto NA + vecto AM
<=> vecto MB = vecto NA
Lại có ; vecto MA + vecto AB = vecto NM + vecto MA
=> vecto AB = vecto NM
2022-11-08 21:26:10
2022-05-08 08:39:58
2022-04-16 17:09:22
1b 2d 3d 4d 5d 1B 2A 3b 4d 5b 6d nhờ ủng hộ
2022-04-14 21:19:07
2022-04-14 21:18:24
2022-04-09 20:33:53
2022-04-09 20:33:53
2022-04-09 20:33:53
2022-04-09 20:33:53