Mathematics
Senior High
この問題の(3)を教えて欲しいです！
パスカルの三角形の使い方が分かりません！
パスカルの三角形を使って,次の式の展開式を求めよ。
(1) (a+b)4
*(2)(x+y)5
・教 p.11, 12
(3)) (a+1)*
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