Mathematics
Senior High
平面ベクトルです。3、4を教えてください。
右の図の正六角形ABCDEF において, A=d, OB=b
とするとき、次のベクトルをa, を用いて表せ。
(1) AB
(2) EA
(3) DF
(4) BF
A
B
18
F
b
0
E
C
D
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