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AG=kAF=(16/15)AF
AG/AF=16/15
AG:AF=16:15
AG=AF+FG
mを適当な実数として、AG=16m、AF=15mとおくと、FG=AG-AF=m
よって、AF:FG=15:1

島野島次郎

なるほど!ありがとうございます。

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