Mathematics
Senior High
Solved
解答、解説お願いします!
13 平行四辺形 ABCD の辺 BC を3:1に内分す
A
る点をE,辺CD を1:4に外分する点をFと
すると,3点A, E, Fは一直線上にあること
-3
を証明せよ。
p.76
B
E
10
F
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