Mathematics
Undergraduate
ベクトルの問題で
正方形 ABCDでACとBDの交点はOとし、AB→＝a→、AD→＝b→とする時、次のおのおのをa→、b→で表せ。
(1) AB→+BC→+CD→
(2)AB→+OD→-OA→
(3)AB→+CB→+BD→
(4)AC→+BD→
解答と解説お願いします
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