Mathematics
Senior High
(1)のPベクトルが3/-a+2bでは無く、3/a+2bになるのは何故ですか
する点をP, QRとすぇ。
1) P, QRの位置クタトルヵ の ヶをそれ
。ぞれ2, ヵ cで表せ。
9 = (かの
ーー
重心の位置ベクトルをの, も c
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