NADANAZ376 NADANAZ376 Mathématiques Answered ABCestuntriangleetGsoncentredegravité (−−→GA+−−→GB+−−→GC=−→0)etOestlemilieude[BC]. Montrerque: {−−→OA=3−−→OG −2−−→GO+−−→GB+−−→GC=−→0
