Mathematics
Senior High
高二です
三角形ABCの重心をGとして、
AGベクトルを写真のように表すのがなぜか
教えてください！
A
と,条件から8DAGA D
Ac
AG=
= b + c
4
5A8+
3
IG
4
=
35 (2b+5c)
B4
-4-
E3
C
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