Mathematics
Senior High
ここの式変換が分かりません。
教えてください🙏
1日 ツ
つ, ボリは,
nCn-1 (x-2)・2"-1+nCn2"=n・2"-' (x-2)+2
n
1 =n·2-¹x-(n-1)2"
別解)
2.
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